Table 1 Average δ13C, δ18O, and Δ47 values for all 30 sample materials.

Uncertainty corresponds to ±1 SD from replicate analyses. Inferred paleotemperatures were calculated from Δ47 values using the calibration from Staudigel et al. (25). ARF, absolute reference frame; VPDB, Vienna PDB.

δ13Cδ18OΔ47Inferred
paleotemperature
Sample groupIDN(‰VPDB)±(‰VPDB)±(‰ARF)±(°C)
CR_ModernA23.5580.052−0.1260.0920.6730.00432.7
CR_ModernB1−2.7750.1660.69226.1
CR_ModernC1−2.9110.2800.67532.0
CR_ModernD2−3.1960.0250.3070.1300.6870.00027.8
CR_ModernE14.708−0.4480.70123.2
CR_ModernF11.7300.7100.69425.4
CRNWR_P13 (shell midden) samples
Level 1.1A13.413−0.0970.68727.8
Level 1.1B12.954−0.4310.68727.8
Level 1.1C12.8660.1950.68129.8
Level 1.1D24.2440.033−0.5700.0120.5980.04763.3
Level 1.1E24.4120.021−0.4290.0440.5970.00864.1
Level 1.1F24.2410.069−0.0770.0310.6390.01045.3
Level 1.2A23.1230.0790.0620.0670.7040.01922.1
Level 1.2B13.6790.0610.66037.2
Level 1.2C23.7760.005−0.7480.0490.5070.044117.6
Level 1.2D14.029−0.3950.67930.5
Level 1.2E23.4940.0070.0840.0830.6390.00145.6
Level 1.2F23.2340.1520.1130.0750.5730.02776.0
Level 1.3A22.3780.0910.1680.1430.6200.01953.5
Level 1.3B21.8720.011−0.2360.0060.5610.02282.4
Level 1.3C23.4560.0710.0300.0280.6890.00727.1
Level 1.3D24.0200.039−0.2120.0080.6890.00627.1
Level 1.3E13.3660.1470.68827.4
Level 1.3F13.0390.0330.68528.2
Level 1.4A23.2730.022−0.0280.0850.7060.02621.3
Level 1.4B21.6450.040−0.4820.0280.6340.00547.7
Level 1.4C23.2900.002−0.0280.0140.5440.02192.7
Level 1.4D24.2600.034−0.5160.0010.5860.00469.3
Level 1.4E24.0840.013−0.4950.0480.6570.00338.4
Level 1.4F13.9740.1780.67232.9