Data from: "Response to comment on 'Otolith d18O record of mid-Holocene
sea surface temperatures in Peru'"
C. Fred. T. Andrus, Douglas E. Crowe, Daniel H. Sandweiss, Elizabeth J. Reitz, 
Christopher S. Romanek, and Kirk A. Maasch
2003 Science, 299(5604): 203b.

The data come from two cockles (Trachycardium procerum). 
The larger dataset was measured from a shell collected after the 1982-1983 El Nino near Casma, Peru.
The collection this shell came from was described in Rollins et al. 1986 and 1987

The smaller dataset was derived from a shell excavated from the Ostra Site (8º 55' S)
The shell is from a strata dated to 5830±90 14C yrs BP. This site was described in Sandweiss et al. 1996



Oxygen isotope data from Trachycardium procerum collected in 1984 near Casma, Peru:
Distance from umbo (mm  d18O
         0.9            -1.5
         1.6            -1.3
         5.15           -1.1
         14.4           -1.3
        17.35           -1.4
         20.2           -1.5
         22.4           -1.5
         23.5           -1.5
         25.6           -1.5
         27.8           -1.6
         29.8           -1.6
         31.7           -1.6
         33.9           -1.6
         35.8           -1.9
         37.3           -2.1
          39             -2
         42.2           -2.1
         44.5            -2
        49.45           -1.7
         51.2           -1.7
         53.9           -1.4
         55.8           -1.6
         57.1           -2.3
         58.4           -2.6
         60.3           -2.7
        61.25           -2.6
         62.2            -2
         63.3           -1.8
         64.8           -1.7
         66.8           -1.2

Precision = 0.07‰ (1s)

Oxygen isotope data from Trachycardium procerum excavated from the 
Ostra Site (5830±90 14C yrs BP - 8º 55’ S):

Distance from umbo (mm  d18O
         7.5            -0.1
          15            -0.7
         22.5           -0.6
          30            0.4
         37.5           0.4
          45            -0.1
         52.5           -0.7
          60            -1.3

Precision = 0.07‰ (1s)