Central Arctic Ocean 150KYr Amino Acid Racemization Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Central Arctic Ocean 150KYr Amino Acid Racemization Data LAST UPDATE: 1/2011 (Original receipt by WDC Paleo) CONTRIBUTORS: Kaufman, D.S., L. Polyak, R. Adler, J.E.T. Channell, and C. Xuan. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2011-010 WDC PALEO CONTRIBUTION SERIES CITATION: Kaufman, D.S., et al. 2010. Central Arctic Ocean 150KYr Amino Acid Racemization Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2011-010. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Kaufman, D.S., L. Polyak, R. Adler, J.E.T. Channell, and C. Xuan. 2008. Dating late Quaternary planktonic foraminifer Neogloboquadrina pachyderma from the Arctic Ocean using amino acid racemization. Paleoceanography, Vol. 23, PA3224, doi:10.1029/2008PA001618. ABSTRACT: The long-term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. The racemization rates for aspartic acid (Asp) and glutamic acid (Glu) in the common taxon, Neogloboquadrina pachyderma, were calibrated for the last 150 ka using 14C ages and the emerging Quaternary chronostratigraphy of Arctic Ocean sediments. An analysis of errors indicates realistic age uncertainties of about ±12% for Asp and ±17% for Glu. Fifty individual tests are sufficient to analyze multiple subsamples, identify outliers, and derive robust sample mean values. The new age equation can be applied to verify and refine age models for sediment cores elsewhere in the Arctic Ocean, a critical region for understanding the dynamics of global climate change. GEOGRAPHIC REGION: Arctic Ocean PERIOD OF RECORD: 222KYrBP - present FUNDING SOURCES: US National Science Foundation (EAR-0620455) DESCRIPTION: Amino acid racemization data on N. pachyderma samples from marine sediment cores in the central Arctic Ocean. D/L and concentration for aspartic acid, glutamic acid, and serine in Neogloboquadrina pachyderma from sediment cores from Lomonosove, Mendeleev, and Northwind ridges, central Arctic Ocean. Lab: Northern Arizona University Lab PI: Kaufman, D.S. Preparation date: Nov 2006 through Jan 2008 Pretreatment: Sieve >150 µm, repeated sonication, 3% pyroxide for 2 hr AA fraction = AMINO FRACTION Hydrolysis procedure: 6 hr at 110°C in 7 µL of 6 M HCl under N2 Bleach: No Analytical method: RPLC Instrumental programming: Concentration is based on internal calibration with L-hArg Area or height ratio: Height Blank corrections: none Response factors: none Data screening criteria: Rejection criteria: 1 = L-Ser/L-Asp > 0.8; 2 = Asp or Glu D/L fall off the covarience trend; 3 = Asp or Glu D/L > ± 2s beyond group mean Collector: Polynak, Leoind, Ohio State University DATA: 1. Extent of amino acid racemization (D/L) for aspartic acid (Asp), glutamic acid (Glu), and serine (Ser) in Neogloboquadrina pachyderma from Arctic Ocean cores LAB LAB# OCEAN AREA SITE NAME CoreDepth LAT°N LON°W WaterDepth SAMPLE TYPE GENUS SPECIES #Tests Rej.Crit* AminoFrac. AspD/L GluD/L SerD/L L-Ser/L-Asp AspConc. GluConc. SerConc(pM/test) UAL 5913 A Arctic Ocean Northwind Ridge 88AR-P5 364-366 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 3 3 THAA 0.337 0.137 0.054 0.7 3.7 3.1 2.2 UAL 5913 B Arctic Ocean Northwind Ridge 88AR-P5 364-367 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 3 1 THAA 0.358 0.166 0.039 1.0 2.2 1.7 1.7 UAL 5913 C Arctic Ocean Northwind Ridge 88AR-P5 364-368 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 3 THAA 0.397 0.199 0.051 0.7 2.8 1.9 1.6 UAL 5913 D Arctic Ocean Northwind Ridge 88AR-P5 364-369 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 3 1 THAA 0.316 0.145 0.039 1.0 3.8 2.8 2.8 UAL 5913 E Arctic Ocean Northwind Ridge 88AR-P5 364-370 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.424 0.204 0.100 0.4 3.1 1.9 1.0 UAL 5913 F Arctic Ocean Northwind Ridge 88AR-P5 364-371 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.415 0.187 0.080 0.6 2.7 1.7 1.2 UAL 5913 G Arctic Ocean Northwind Ridge 88AR-P5 364-372 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 15 THAA 0.397 0.186 0.072 0.6 2.7 1.9 1.2 UAL 5913 H Arctic Ocean Northwind Ridge 88AR-P5 364-373 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 15 3 THAA 0.352 0.142 0.063 0.6 2.4 1.9 1.1 UAL 5916 A Arctic Ocean Northwind Ridge 88AR-P5 317-319 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.407 0.201 0.124 0.4 2.2 1.5 0.8 UAL 5916 B Arctic Ocean Northwind Ridge 88AR-P5 317-319 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 2 THAA 0.368 0.156 0.094 0.5 2.2 1.6 0.9 UAL 5916 C Arctic Ocean Northwind Ridge 88AR-P5 317-319 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.380 0.203 0.092 0.5 1.6 1.1 0.7 UAL 5916 D Arctic Ocean Northwind Ridge 88AR-P5 317-319 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.375 0.188 0.082 0.6 1.6 1.1 0.7 UAL 5916 E Arctic Ocean Northwind Ridge 88AR-P5 317-319 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.419 0.218 0.112 0.4 1.4 0.9 0.5 UAL 5917 A Arctic Ocean Northwind Ridge 88AR-P5 179-181 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.360 0.158 0.100 0.5 2.1 1.4 0.9 UAL 5917 B Arctic Ocean Northwind Ridge 88AR-P5 179-181 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.298 0.108 0.060 0.8 2.8 2.3 1.7 UAL 5917 C Arctic Ocean Northwind Ridge 88AR-P5 179-181 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.397 0.180 0.118 0.5 1.5 1.0 0.6 UAL 5917 D Arctic Ocean Northwind Ridge 88AR-P5 179-181 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.384 0.168 0.108 0.5 1.7 1.1 0.7 UAL 5917 E Arctic Ocean Northwind Ridge 88AR-P5 179-181 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.494 0.296 0.160 0.8 0.8 0.5 0.5 UAL 5918 A Arctic Ocean Northwind Ridge 88AR-P5 89 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.283 0.127 0.190 0.5 4.9 3.4 2.3 UAL 5918 B Arctic Ocean Northwind Ridge 88AR-P5 89 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.296 0.134 0.172 0.5 3.9 2.6 1.6 UAL 5918 C Arctic Ocean Northwind Ridge 88AR-P5 89 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.279 0.149 0.200 0.5 3.8 2.7 1.6 UAL 5918 D Arctic Ocean Northwind Ridge 88AR-P5 89 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.306 0.146 0.227 0.4 4.2 2.5 1.4 UAL 5918 E Arctic Ocean Northwind Ridge 88AR-P5 89 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.275 0.137 0.229 0.3 4.7 2.4 1.4 UAL 5919 A Arctic Ocean Northwind Ridge 88AR-P5 232-234 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.393 0.188 0.125 0.4 1.8 1.2 0.6 UAL 5919 B Arctic Ocean Northwind Ridge 88AR-P5 232-234 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.339 0.138 0.050 0.9 2.7 2.1 1.8 UAL 5919 C Arctic Ocean Northwind Ridge 88AR-P5 232-234 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.405 0.196 0.133 0.4 2.1 1.3 0.6 UAL 5919 D Arctic Ocean Northwind Ridge 88AR-P5 232-234 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.410 0.200 0.143 0.4 1.6 1.0 0.5 UAL 5919 E Arctic Ocean Northwind Ridge 88AR-P5 232-234 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.409 0.192 0.133 0.4 2.8 1.4 0.7 UAL 5920 A Arctic Ocean Northwind Ridge 88AR-P5 54-56 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.243 0.103 0.252 0.5 4.3 2.4 2.1 UAL 5920 B Arctic Ocean Northwind Ridge 88AR-P5 54-56 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.262 0.127 0.257 0.4 3.2 1.9 1.3 UAL 5920 C Arctic Ocean Northwind Ridge 88AR-P5 54-56 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.238 0.098 0.229 0.4 4.1 2.4 1.6 UAL 5920 D Arctic Ocean Northwind Ridge 88AR-P5 54-56 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.244 0.113 0.259 0.4 3.5 2.0 1.4 UAL 5920 E Arctic Ocean Northwind Ridge 88AR-P5 54-56 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.255 0.116 0.271 0.4 3.2 1.8 1.2 UAL 5921 A Arctic Ocean Northwind Ridge 88AR-P5 0-2 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.092 0.037 0.120 0.5 4.9 2.8 2.4 UAL 5921 B Arctic Ocean Northwind Ridge 88AR-P5 0-2 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.089 0.049 0.093 0.5 3.6 2.1 1.8 UAL 5921 C Arctic Ocean Northwind Ridge 88AR-P5 0-2 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.093 0.058 0.133 0.7 4.3 2.7 3.0 UAL 5921 D Arctic Ocean Northwind Ridge 88AR-P5 0-2 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.103 0.040 0.086 0.6 3.4 2.3 2.1 UAL 5921 E Arctic Ocean Northwind Ridge 88AR-P5 0-2 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.114 0.065 0.130 0.6 2.4 1.5 1.4 UAL 5922 A Arctic Ocean Northwind Ridge 88AR-P5 124-126 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.379 0.179 0.234 0.5 2.4 1.7 1.0 UAL 5922 B Arctic Ocean Northwind Ridge 88AR-P5 124-126 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.265 0.110 0.044 1.3 3.6 2.4 3.7 UAL 5922 C Arctic Ocean Northwind Ridge 88AR-P5 124-126 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.357 0.195 0.223 0.3 2.9 1.8 0.9 UAL 5922 D Arctic Ocean Northwind Ridge 88AR-P5 124-126 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.332 0.147 0.156 0.5 3.1 2.1 1.2 UAL 5922 E Arctic Ocean Northwind Ridge 88AR-P5 124-126 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.327 0.129 0.117 0.6 2.8 2.1 1.4 UAL 5923 A Arctic Ocean Northwind Ridge 88AR-P5 190-192 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.414 0.200 0.161 0.4 2.3 1.6 0.7 UAL 5923 B Arctic Ocean Northwind Ridge 88AR-P5 190-192 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 2 THAA 0.519 0.346 0.205 0.4 1.4 0.8 0.5 UAL 5923 C Arctic Ocean Northwind Ridge 88AR-P5 190-192 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.408 0.225 0.150 0.3 1.6 0.9 0.5 UAL 5923 D Arctic Ocean Northwind Ridge 88AR-P5 190-192 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.397 0.210 0.128 0.4 1.5 0.9 0.5 UAL 5923 E Arctic Ocean Northwind Ridge 88AR-P5 190-192 74.6225 -157.884 1089 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.404 0.215 0.155 0.3 2.4 1.4 0.7 UAL 5926 A Arctic Ocean Lomonsov Ridge 96/12-1PC 0.95 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.256 0.127 0.255 0.8 1.6 1.1 1.2 UAL 5926 B Arctic Ocean Lomonsov Ridge 96/12-1PC 0.95 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.271 0.131 0.225 0.6 2.2 1.4 1.2 UAL 5926 C Arctic Ocean Lomonsov Ridge 96/12-1PC 0.95 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.264 0.142 0.216 0.9 2.0 1.2 1.7 UAL 5926 D Arctic Ocean Lomonsov Ridge 96/12-1PC 0.95 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.269 0.125 0.243 0.6 2.2 1.4 1.2 UAL 5926 E Arctic Ocean Lomonsov Ridge 96/12-1PC 0.95 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.265 0.112 0.198 0.6 2.5 1.7 1.5 UAL 5926 F Arctic Ocean Lomonsov Ridge 96/12-1PC 0.95 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.261 0.105 0.197 0.5 4.1 2.6 1.8 UAL 5927 A Arctic Ocean Lomonsov Ridge 96/12-1PC 19.15 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.160 0.089 0.129 0.6 2.6 0.3 1.4 UAL 5927 B Arctic Ocean Lomonsov Ridge 96/12-1PC 19.15 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.153 0.088 0.128 0.5 2.0 1.2 1.1 UAL 5927 C Arctic Ocean Lomonsov Ridge 96/12-1PC 19.15 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.147 0.097 0.148 0.8 1.9 1.2 1.6 UAL 5927 D Arctic Ocean Lomonsov Ridge 96/12-1PC 19.15 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.124 0.065 0.114 1.0 1.5 1.1 1.5 UAL 5927 E Arctic Ocean Lomonsov Ridge 96/12-1PC 19.15 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.149 0.087 0.177 0.7 1.3 0.9 0.9 UAL 5928 A Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.319 0.166 0.241 0.7 1.7 1.0 1.0 UAL 5928 B Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.345 0.179 0.195 0.7 1.4 1.0 0.9 UAL 5928 C Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.315 0.166 0.224 0.3 3.1 1.6 1.0 UAL 5928 D Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.308 0.114 0.24 0.6 3.0 1.8 1.8 UAL 5928 E Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.294 0.151 0.184 1.2 0.9 0.6 1.0 UAL 5928 F Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.286 0.116 0.128 0.5 5.2 3.3 2.4 UAL 5928 G Arctic Ocean Lomonsov Ridge 96/12-1PC 177 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.307 0.134 0.137 0.7 3.7 2.4 2.3 UAL 5929 A Arctic Ocean Lomonsov Ridge 96/12-1PC 199.55 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.423 0.215 0.152 1.3 0.6 0.5 0.6 UAL 5929 B Arctic Ocean Lomonsov Ridge 96/12-1PC 199.55 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.432 0.217 0.144 0.5 1.0 0.7 0.4 UAL 5929 D Arctic Ocean Lomonsov Ridge 96/12-1PC 199.55 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.408 0.195 0.130 0.6 1.6 1.1 0.8 UAL 5929 E Arctic Ocean Lomonsov Ridge 96/12-1PC 199.55 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.300 0.109 0.052 1.4 1.8 2.0 2.1 UAL 5929 F Arctic Ocean Lomonsov Ridge 96/12-1PC 199.55 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 5.5 THAA 0.373 0.171 0.114 0.6 1.5 1.0 0.7 UAL 5930 A Arctic Ocean Lomonsov Ridge 96/12-1PC 207.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.409 0.229 0.157 0.4 1.0 0.5 0.3 UAL 5930 B Arctic Ocean Lomonsov Ridge 96/12-1PC 207.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.420 0.227 0.195 0.3 0.9 0.4 0.2 UAL 5930 C Arctic Ocean Lomonsov Ridge 96/12-1PC 207.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.375 0.166 0.111 0.5 1.1 0.7 0.4 UAL 5930 D Arctic Ocean Lomonsov Ridge 96/12-1PC 207.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.328 0.163 0.058 0.8 1.1 0.8 0.8 UAL 5931 A Arctic Ocean Lomonsov Ridge 96/12-1PC 219.75 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.378 0.154 0.124 0.4 1.8 1.2 0.6 UAL 5931 B Arctic Ocean Lomonsov Ridge 96/12-1PC 219.75 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.411 0.202 0.130 0.4 0.8 0.5 0.3 UAL 5931 C Arctic Ocean Lomonsov Ridge 96/12-1PC 219.75 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.374 0.165 0.090 0.5 1.1 0.7 0.5 UAL 5931 D Arctic Ocean Lomonsov Ridge 96/12-1PC 219.75 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.388 0.195 0.123 0.4 1.5 0.8 0.5 UAL 5931 E Arctic Ocean Lomonsov Ridge 96/12-1PC 219.75 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.410 0.204 0.042 0.4 1.3 0.7 0.4 UAL 5932 A Arctic Ocean Lomonsov Ridge 96/12-1PC 258.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.443 0.243 0.151 0.3 0.7 0.3 0.2 UAL 5932 B Arctic Ocean Lomonsov Ridge 96/12-1PC 258.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 3 THAA 0.532 0.363 0.169 0.4 0.6 0.3 0.2 UAL 5932 C Arctic Ocean Lomonsov Ridge 96/12-1PC 258.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.475 0.255 0.257 0.2 2.6 1.3 0.5 UAL 5932 D Arctic Ocean Lomonsov Ridge 96/12-1PC 258.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.441 0.246 0.090 0.6 2.7 1.4 1.3 UAL 5932 E Arctic Ocean Lomonsov Ridge 96/12-1PC 258.25 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.399 0.177 0.116 0.4 3.4 2.0 1.1 UAL 5933 A Arctic Ocean Lomonsov Ridge 96/12-1PC 275.8 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.496 0.294 0.192 0.3 1.9 0.9 0.4 UAL 5933 B Arctic Ocean Lomonsov Ridge 96/12-1PC 275.8 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.429 0.212 0.106 0.4 1.3 0.8 0.4 UAL 5933 C Arctic Ocean Lomonsov Ridge 96/12-1PC 275.8 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.493 0.290 0.170 0.3 1.2 0.6 0.3 UAL 5933 D Arctic Ocean Lomonsov Ridge 96/12-1PC 275.8 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.442 0.214 0.108 0.4 1.6 0.9 0.5 UAL 5933 E Arctic Ocean Lomonsov Ridge 96/12-1PC 275.8 87.0983 -144.773 1003 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.456 0.230 0.143 0.4 1.8 1.0 0.5 UAL 6134 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 0-1 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.068 0.041 0.100 0.9 2.8 1.6 2.5 UAL 6134 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 0-1 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.078 0.034 0.123 0.4 6.6 3.4 3.0 UAL 6134 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 0-1 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.081 0.035 0.146 0.6 3.7 2.1 2.3 UAL 6134 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 0-1 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.087 0.036 0.155 0.4 7.3 3.7 3.2 UAL 6134 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 0-1 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.075 0.036 0.121 0.4 3.7 1.9 1.7 UAL 6135 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 24-25 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.111 0.039 0.168 0.5 4.0 2.1 1.9 UAL 6135 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 24-25 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.097 0.096 0.121 2.6 0.7 0.3 1.9 UAL 6135 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 24-25 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.112 0.038 0.182 0.4 5.7 2.9 2.6 UAL 6135 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 24-25 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 4 THAA 0.106 0.040 0.165 0.4 8.2 4.3 3.8 UAL 6136 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 32-33 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.203 0.085 0.254 0.4 4.2 2.2 1.6 UAL 6136 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 32-33 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.208 0.092 0.256 0.4 4.7 2.3 1.9 UAL 6136 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 32-33 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.177 0.072 0.159 0.7 3.1 2.0 2.0 UAL 6136 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 32-33 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 4.5 THAA 0.185 0.095 0.222 0.7 5.2 3.4 3.8 UAL 6137 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 43-44 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.222 0.085 0.183 0.5 5.3 3.5 2.8 UAL 6137 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 43-44 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.234 0.121 0.306 0.6 3.0 1.7 1.9 UAL 6137 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 43-44 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.218 0.110 0.171 0.6 2.9 1.8 1.8 UAL 6137 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 43-44 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.139 0.045 0.050 1.2 6.2 6.0 7.2 UAL 6137 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 43-44 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.224 0.104 0.237 0.4 5.8 3.0 2.2 UAL 6137 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 43-44 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.209 0.098 0.217 0.7 2.6 1.7 1.8 UAL 6138 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 52-53 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.277 0.134 0.288 0.3 3.9 2.1 1.2 UAL 6138 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 52-53 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.286 0.130 0.297 0.4 3.6 2.0 1.3 UAL 6138 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 52-53 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.281 0.134 0.241 0.4 2.2 1.2 0.8 UAL 6138 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 52-53 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.270 0.122 0.265 0.3 7.2 3.8 2.2 UAL 6138 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 52-53 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.269 0.148 0.276 0.4 2.9 1.5 1.2 UAL 6138 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 52-53 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.283 0.121 0.216 0.4 4.2 2.6 1.7 UAL 6139 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 62-63 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.296 0.130 0.216 0.4 5.6 3.2 2.2 UAL 6139 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 62-63 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.302 0.146 0.235 0.6 3.2 2.3 1.8 UAL 6139 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 62-63 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.287 0.146 0.194 0.5 4.1 2.4 1.9 UAL 6139 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 62-63 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.289 0.136 0.226 0.4 3.7 2.1 1.5 UAL 6139 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 62-63 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.286 0.137 0.230 0.4 3.5 1.9 1.3 UAL 6139 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 62-63 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 3 THAA 0.308 0.161 0.213 0.5 3.8 2.2 1.8 UAL 6140 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 14-15 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 3 THAA 0.120 0.041 0.192 0.4 6.7 3.5 2.7 UAL 6140 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 14-15 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7.5 THAA 0.106 0.042 0.166 0.4 5.9 3.1 2.6 UAL 6140 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 14-15 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7.5 THAA 0.109 0.049 0.153 0.5 3.8 2.1 1.9 UAL 6141 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 7-8 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.107 0.040 0.167 0.4 3.8 2.0 1.7 UAL 6141 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 7-8 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.097 0.035 0.168 0.4 4.3 2.2 1.9 UAL 6141 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 7-8 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.091 0.035 0.137 0.4 3.4 1.8 1.5 UAL 6141 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 7-8 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.089 0.027 0.081 0.7 5.5 3.9 3.7 UAL 6142 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 34-35 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.198 0.081 0.209 0.4 4.7 2.6 2.0 UAL 6142 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 34-35 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.172 0.061 0.128 0.7 5.7 3.9 3.9 UAL 6142 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 34-35 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.208 0.091 0.225 0.4 4.4 2.1 1.7 UAL 6142 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 34-35 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.179 0.069 0.151 0.6 8.0 5.1 4.6 UAL 6142 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 34-35 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.206 0.091 0.232 0.4 5.1 2.6 2.1 UAL 6142 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 34-35 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 5 THAA 0.178 0.063 0.110 0.7 5.0 3.5 3.5 UAL 6143 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 48-49 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.142 0.018 0.039 1.2 10.0 43.1 10.8 UAL 6143 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 48-49 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.251 0.078 0.193 0.5 4.2 3.7 2.0 UAL 6143 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 48-49 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.264 0.115 0.232 0.4 3.3 1.9 1.3 UAL 6143 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 48-49 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.273 0.125 0.268 0.4 3.4 1.9 1.3 UAL 6143 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 48-49 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 5.5 THAA 0.257 0.119 0.210 0.4 5.3 3.0 2.2 UAL 6144 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 56-57 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.292 0.136 0.260 0.4 2.5 1.4 0.9 UAL 6144 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 56-57 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.306 0.169 0.278 0.3 2.8 1.7 0.9 UAL 6144 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 56-57 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.239 0.087 0.095 1.1 2.4 1.8 2.3 UAL 6144 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 56-57 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.283 0.114 0.182 0.5 2.4 1.5 1.2 UAL 6144 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 56-57 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.259 0.105 0.183 0.5 5.1 3.5 2.5 UAL 6149 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 105-106 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.317 0.164 0.207 0.3 3.7 1.9 1.2 UAL 6149 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 105-106 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.314 0.157 0.251 0.3 4.3 2.4 1.2 UAL 6149 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 105-106 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.305 0.145 0.238 0.3 5.8 2.9 1.6 UAL 6149 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 105-106 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.300 0.150 0.228 0.3 3.3 1.7 1.0 UAL 6387 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 73-74 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.269 0.105 0.157 0.6 6.3 4.0 3.2 UAL 6387 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 73-74 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.262 0.093 0.134 0.7 5.7 4.2 3.8 UAL 6387 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 73-74 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.197 0.054 0.051 1.1 nd nd nd UAL 6387 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 73-74 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.303 0.120 0.166 0.5 nd nd nd UAL 6387 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 73-74 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.270 0.087 0.105 0.7 nd nd nd UAL 6388 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 83-84 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.266 0.116 0.126 0.5 3.4 2.1 1.6 UAL 6388 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 83-84 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 3 THAA 0.248 0.090 0.114 0.7 3.3 2.3 2.0 UAL 6388 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 83-84 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.293 0.131 0.239 0.5 2.2 1.4 1.1 UAL 6388 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 83-84 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.284 0.117 0.198 0.5 3.7 2.2 1.7 UAL 6388 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 83-84 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.290 0.126 0.242 0.4 3.5 2.0 1.3 UAL 6389 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 93-94 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.351 0.168 0.243 0.3 nd nd nd UAL 6389 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 93-94 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.337 0.184 0.232 0.4 nd nd nd UAL 6390 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 115-116 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.381 0.194 0.244 0.3 4.7 2.6 1.3 UAL 6390 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 115-116 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.345 0.157 0.254 0.3 3.1 1.7 0.9 UAL 6390 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 115-116 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.354 0.169 0.252 0.3 5.3 2.8 1.4 UAL 6390 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 115-116 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.362 0.186 0.303 0.3 5.4 2.7 1.4 UAL 6390 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 115-116 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 3 THAA 0.259 0.083 0.079 0.7 5.2 4.1 3.3 UAL 6391 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 132-133 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 1 THAA 0.255 0.100 0.054 1.0 4.1 3.1 3.4 UAL 6391 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 132-133 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 10 THAA 0.354 0.168 0.181 0.4 4.8 2.7 1.6 UAL 6391 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 132-133 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.363 0.185 0.223 0.3 4.5 2.3 1.4 UAL 6391 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 132-133 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.347 0.174 0.219 0.3 4.6 2.3 1.3 UAL 6392 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 145-146 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.355 0.158 0.183 0.5 2.0 1.3 0.9 UAL 6392 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 145-146 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.329 0.131 0.096 0.5 2.9 1.9 1.2 UAL 6393 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 179-180 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.464 0.234 0.190 0.3 2.2 1.3 0.6 UAL 6393 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 179-180 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.475 0.244 0.219 0.3 3.0 1.6 0.7 UAL 6393 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 179-180 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.460 0.235 0.232 0.3 2.4 1.3 0.6 UAL 6393 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 179-180 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.448 0.214 0.183 0.4 3.3 2.0 1.0 UAL 6394 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 226-227 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.388 0.179 0.106 0.5 3.9 2.4 1.5 UAL 6394 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 226-227 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.410 0.199 0.168 0.3 2.1 1.1 0.6 UAL 6394 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 226-227 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.408 0.187 0.193 0.4 2.8 1.6 1.0 UAL 6394 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 226-227 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 3 THAA 0.513 0.309 0.120 0.6 1.2 0.7 0.5 UAL 6394 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 226-227 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 1 THAA 0.330 0.112 0.053 0.9 3.1 2.4 2.2 UAL 6395 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 238-239 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.390 0.168 0.101 0.4 3.8 2.2 1.3 UAL 6395 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 238-239 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.372 0.157 0.099 0.4 4.3 2.6 1.5 UAL 6395 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 238-239 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.411 0.196 0.139 0.3 4.7 2.5 1.3 UAL 6395 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 238-239 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.403 0.186 0.139 0.4 4.8 2.7 1.4 UAL 6395 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 238-239 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 9 THAA 0.398 0.179 0.117 0.4 3.9 2.2 1.2 UAL 6396 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 246-247 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 1 THAA 0.303 0.107 0.050 1.3 2.3 1.9 2.5 UAL 6396 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 246-247 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.379 0.157 0.091 0.5 3.5 2.2 1.3 UAL 6396 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 246-247 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.394 0.168 0.119 0.4 3.4 2.1 1.0 UAL 6396 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 246-247 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 1 THAA 0.086 0.026 0.007 1.7 15.2 20.1 23.5 UAL 6396 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 246-247 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.393 0.178 0.117 0.4 3.9 2.2 1.2 UAL 6510 A Arctic Ocean Mendeleev Ridge HLY0503-11MC-2 5-6 83.1283 -174.693 2570 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.199 0.086 0.193 0.7 2.4 1.9 1.6 UAL 6510 B Arctic Ocean Mendeleev Ridge HLY0503-11MC-2 5-6 83.1283 -174.693 2570 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.185 0.075 0.149 0.7 1.6 1.2 1.2 UAL 6510 C Arctic Ocean Mendeleev Ridge HLY0503-11MC-2 5-6 83.1283 -174.693 2570 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.207 0.110 0.206 0.5 2.7 1.6 1.3 UAL 6510 F Arctic Ocean Mendeleev Ridge HLY0503-11MC-2 5-6 83.1283 -174.693 2570 Foraminifera Neogloboquadrina pachyderma (s) 5 THAA 0.265 0.131 0.350 0.3 5.9 3.2 2.0 UAL 6510 G Arctic Ocean Mendeleev Ridge HLY0503-11MC-2 5-6 83.1283 -174.693 2570 Foraminifera Neogloboquadrina pachyderma (s) 5 THAA 0.269 0.130 0.273 0.5 2.8 1.7 1.5 UAL 6511 A Arctic Ocean Mendeleev Ridge HLY0503-10MC-2 10-11 81.2283 -177.216 1841 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.288 0.140 0.220 0.4 2.9 1.5 1.1 UAL 6511 B Arctic Ocean Mendeleev Ridge HLY0503-10MC-2 10-11 81.2283 -177.216 1841 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.273 0.135 0.185 0.5 4.3 2.3 1.9 UAL 6511 E Arctic Ocean Mendeleev Ridge HLY0503-10MC-2 10-11 81.2283 -177.216 1841 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.284 0.146 0.265 0.4 2.0 1.1 0.7 UAL 6511 F Arctic Ocean Mendeleev Ridge HLY0503-10MC-2 10-11 81.2283 -177.216 1841 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.249 0.121 0.207 0.4 3.6 2.0 1.3 UAL 6511 G Arctic Ocean Mendeleev Ridge HLY0503-10MC-2 10-11 81.2283 -177.216 1841 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.300 0.145 0.318 0.4 2.4 1.3 0.9 UAL 6717 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.380 0.200 0.072 0.7 0.6 0.4 0.3 UAL 6717 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.417 0.208 0.126 0.5 0.9 0.6 0.4 UAL 6717 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.395 0.181 0.087 0.7 1.0 0.7 0.5 UAL 6717 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.417 0.204 0.121 0.6 0.8 0.5 0.4 UAL 6717 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.366 0.165 0.096 0.6 1.2 0.8 0.6 UAL 6717 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.414 0.211 0.110 0.6 0.8 0.5 0.4 UAL 6717 G Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.440 0.212 0.172 0.4 1.9 1.2 0.6 UAL 6717 H Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.408 0.191 0.122 0.5 1.6 1.1 0.7 UAL 6717 I Arctic Ocean Mendeleev Ridge HLY0503-8JPC 180-181 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 1 THAA 0.336 0.151 0.061 0.8 1.0 0.8 0.7 UAL 6718 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.362 0.184 0.053 0.8 1.0 0.7 0.6 UAL 6718 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.398 0.186 0.108 0.5 1.4 0.9 0.5 UAL 6718 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 2 THAA 0.433 0.180 0.177 0.3 2.4 1.5 0.6 UAL 6718 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.380 0.170 0.124 0.4 2.3 1.4 0.8 UAL 6718 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.408 0.196 0.143 0.4 1.8 1.1 0.6 UAL 6718 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.369 0.167 0.094 0.5 1.4 1.0 0.6 UAL 6718 G Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.439 0.198 0.141 0.4 2.1 1.5 0.6 UAL 6718 H Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.403 0.185 0.120 0.4 1.7 1.0 0.6 UAL 6718 I Arctic Ocean Mendeleev Ridge HLY0503-8JPC 358-359 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 1 THAA 0.346 0.134 0.066 0.8 2.3 1.7 1.3 UAL 6719 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.445 0.220 0.129 0.4 2.3 1.4 0.7 UAL 6719 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.443 0.231 0.162 0.3 2.7 1.5 0.7 UAL 6719 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.433 0.210 0.139 0.3 2.3 1.3 0.6 UAL 6719 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 1 THAA 0.379 0.184 0.068 0.8 1.6 0.9 0.9 UAL 6719 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.408 0.200 0.095 0.5 1.8 1.0 0.8 UAL 6719 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.378 0.172 0.077 0.6 1.4 0.9 0.7 UAL 6719 G Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.396 0.183 0.115 0.4 1.4 0.8 0.5 UAL 6719 H Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.428 0.211 0.114 0.4 2.0 1.1 0.7 UAL 6719 I Arctic Ocean Mendeleev Ridge HLY0503-8JPC 404-405 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 1 THAA 0.358 0.204 0.037 1.3 1.7 0.9 1.6 UAL 6720 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.411 0.196 0.105 0.4 2.3 1.4 0.7 UAL 6720 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.438 0.219 0.127 0.4 2.6 1.5 0.7 UAL 6720 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.460 0.238 0.164 0.3 2.9 1.6 0.7 UAL 6720 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.440 0.222 0.142 0.3 2.7 1.5 0.7 UAL 6720 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.456 0.231 0.146 0.3 2.5 1.4 0.6 UAL 6720 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.384 0.167 0.085 0.5 2.8 1.8 1.1 UAL 6720 G Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 3 THAA 0.350 0.142 0.058 0.6 1.6 1.2 0.8 UAL 6720 H Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.393 0.185 0.098 0.4 2.4 1.5 0.8 UAL 6720 I Arctic Ocean Mendeleev Ridge HLY0503-8JPC 418-419 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 6 THAA 0.449 0.232 0.116 0.4 1.9 1.1 0.5 UAL 6775 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 282-283 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.411 0.215 0.165 0.4 2.7 1.6 0.9 UAL 6775 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 282-283 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.405 0.183 0.148 0.4 2.3 1.3 0.8 UAL 6775 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 282-283 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.397 0.188 0.115 0.5 2.8 1.6 1.2 UAL 6775 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 282-283 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.393 0.168 0.123 0.5 2.5 1.6 0.9 UAL 6775 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 282-283 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.428 0.223 0.170 0.4 2.3 1.3 0.7 UAL 6775 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 282-283 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 7 THAA 0.429 0.226 0.173 0.3 2.4 1.3 0.7 UAL 6776 A Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.409 0.179 0.073 0.5 2.0 1.3 0.8 UAL 6776 B Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 1 THAA 0.362 0.135 0.055 0.8 3.0 2.3 1.8 UAL 6776 C Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.419 0.200 0.107 0.5 2.0 1.2 0.7 UAL 6776 D Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.440 0.200 0.095 0.5 2.2 1.4 0.8 UAL 6776 E Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.490 0.278 0.153 0.3 2.1 1.1 0.5 UAL 6776 F Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.427 0.201 0.095 0.4 3.4 2.0 1.1 UAL 6776 G Arctic Ocean Mendeleev Ridge HLY0503-8JPC 428-429 79.5933 -172.502 2792 Foraminifera Neogloboquadrina pachyderma (s) 8 THAA 0.462 0.253 0.109 0.4 1.5 0.9 0.5 * Rejection criteria are: 1 — L-Ser/L-Asp > 0.8; 2 — Asp or Glu D/L fall off the covarience trend; 3 — Asp or Glu D/L > ± 2s beyond ground mean. 2. Summary data Extent of Racemization (D/L) in Foraminifera From Arctic Ocean Cores Lab ID Depth Aspartic acid Glutamic acid Age*b (UAL) (cm) n*a ex*a D/L sigx D/L sigx (ka) 88AR-P5 5921 1 5 0 0.098 0.005 0.050 0.005 5.53 5920 55 5 0 0.248 0.004 0.111 0.005 35 5918 89 5 0 0.288 0.006 0.139 0.004 61 5922 125 4 1 0.349 0.012 0.163 0.015 85 5917 180 3 2 0.380 0.011 0.169 0.006 100 5923 191 4 1 0.406 0.004 0.213 0.005 105 5919 233 4 1 0.404 0.004 0.194 0.003 123 5916 318 4 1 0.395 0.011 0.203 0.006 193 5913 365 4 4 0.408 0.007 0.194 0.004 222 96-12/1pc 5926 1.0 4 2 0.154 0.003 0.088 0.001 10 5927 19.2 3 2 0.267 0.002 0.118 0.006 35 5928 177.0 6 1 0.313 0.008 0.146 0.011 79 5929 199.5 3 2 0.404 0.017 0.194 0.013 85 5930 207.3 3 1 0.401 0.014 0.207 0.021 100 5931 219.8 5 0 0.392 0.008 0.184 0.010 123 5932 258.3 4 1 0.440 0.016 0.230 0.018 193 5933 275.8 5 0 0.463 0.013 0.248 0.018 222 HLY0503-8JPC 6134 0 4 1 0.080 0.003 0.035 0.000 3.88 6141 7 4 0 0.096 0.004 0.034 0.003 10.06 6140 14 2 1 0.108 0.002 0.046 0.004 9.52 6135 24 3 1 0.110 0.002 0.039 0.001 10.80 6136 32 4 0 0.193 0.007 0.086 0.005 27 6142 34 6 0 0.190 0.006 0.076 0.006 37.47 6137 43 5 1 0.221 0.004 0.104 0.006 43.22 6143 48 4 1 0.261 0.005 0.109 0.011 40 6138 52 6 0 0.278 0.003 0.132 0.004 >47.24 6144 56 4 1 0.285 0.010 0.131 0.014 42.49 6139 62 6 0 0.295 0.004 0.143 0.004 44.82 6387 73 4 1 0.276 0.009 0.101 0.007 48 6388 83 4 1 0.283 0.006 0.123 0.004 51 6389 93 2 0 0.344 0.007 0.176 0.008 53 6149 105 4 0 0.309 0.004 0.154 0.004 56 6390 115 4 1 0.361 0.008 0.177 0.008 61 6391 132 3 1 0.355 0.005 0.176 0.005 79 6392 145 2 0 0.342 0.013 0.145 0.013 90 6393*c 179 4 0 0.462 0.006 0.232 0.006 99 6717 180 8 1 0.405 0.008 0.197 0.006 100 6394 226 3 2 0.402 0.007 0.188 0.006 123 6395 238 5 0 0.395 0.007 0.177 0.007 126 6396 246 3 2 0.389 0.005 0.168 0.006 129 6775 282 6 0 0.411 0.006 0.201 0.010 147 6718 358 6 3 0.400 0.010 0.184 0.005 178 6719 404 7 2 0.419 0.010 0.204 0.008 193 6720 418 8 1 0.429 0.010 0.211 0.009 196 6776 428 6 1 0.441 0.012 0.219 0.016 222 HLY0503-11MC-2 6510 5.5 5 0 0.225 0.018 0.106 0.011 30.95 HLY0503-10MC-2 6511 10.5 5 0 0.279 0.009 0.137 0.005 36.73 Inter-laboratory comparison samples*d ILC-A na 9 0 0.372 0.0 0.184 0.0 na ILC-B na 9 0 0.685 0.002 0.407 0.001 na ILC-C na 9 0 0.889 0.008 0.839 0.001 na *a n — Number of subsamples included; ex — number excluded in calculation of mean and standard error. *b Ages with two decimals — 14C age; other ages — estimated based on stratigraphic correlations. *c Sample rejected because D/L values are considerably higher than any in the underlying 2 m of core. *d ILC samples [Wehmiller, 1984] analyzed during the course of this study.