Black Hills Plot 203 - US203001 Additional Site Information Peter M. Brown Dating Method: Crossdated Sample Storage Location: Rocky Mountain Tree-Ring Research, Inc., Ft. Collins, CO Reference: Brown, P.M. 2001. Landscape Age Structure of Ponderosa Pine Stands, Limestone Plateau, Black Hills National Forest: Final Report. USDA Forest Service, Report CSS-11020399-23. A PDF copy of the text from this report is available at: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/bh_age_finalreport_text.pdf A PDF copy of the figures from this report is avaialbe at: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/bh_age_finalreport_figures.pdf Establishment date data from this site are available at: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/firehistory/establishment/northamerica/us203001.dat Comments: Thirty of 30 trees were dated. Three are not shown on the chronology diagram: tree 21 extended from 1290 (pith) to 1464, with one scar recorded at 1388, tree 23 extended from 1198 (pith) to 1385, and tree 27 extended from 1201 (pith) to 1535, with scars at 1224, 1236, 1250, and 1262. This plot also was very old for the most part, with 10 trees dating to the early 1500s cohort, between 1526 and 1546. Other trees were more scattered in pith ages than other plots, with most likely dating to the latter 1700s cohort. Two of the oldest living trees found in any plots were in this stand on the flanks of Hell Canyon just above Highway 16. Many of the trees in the plot at the time of sampling had died of mountain pine beetle, and almost all the remaining living pre- settlement trees in the stand were killed in the recent Jasper fire as a result of often dense doghair in this area. Site Diagram: The Site Chronology Diagram was provided by the investigator. Time spans of trees are represented by horizontal lines with dates of fire scars marked by inverted triangles. Dashed lines are estimated number of years to pith. Vertical lines to left on tree chronologies are pith dates with inside dates (i.e., unknown number of years to pith) marked by slanted lines. Vertical lines to right on tree chronologies are bark dates (= death dates) with outside dates (i.e., unknown number of years to death date) marked by slanted lines. Note that x-axis varies on chronologies. Fire History Graphs: Fire History Graphs illustrate specific years when fires occurred and how many trees were scarred. They are available in both PDF and PNG formats. The graphs consist of 2 parts, both of which show the X axis (time line) at the bottom with the earliest year of information on the left and the latest on the right. The Fire Index Plot is the topmost plot, and shows two variables: sample depth (the number of recording trees in each year) as a blue line along the left Y axis, compared with the percent trees scarred shown as gray bars along the right Y axis. Below, the Fire Chronology Plot consists of horizontal lines representing injuries by year on individual sampled trees. Symbols are overlain that denote the years containing the dendrochronologically-dated fire scars or injuries. The sample ID of each tree is displayed to the right of each line. The Composite Axis below represents the composite information from all individual series. The symbols used to represent the fire scars or injuries, and the filters used to determine the composite information, are shown in the legend. These graphs were created using the Fire History Analysis and Exploration System (FHAES). See http://frames.nbii.gov/fhaes/ for more information.