Table 2.

Regression coefficients between the GEOCARB and acritarch genus-richness curves. The acritarch genus data is progressively shifted to the left in 10 Ma increments and the regression coefficient is re-calculated to find the closest fit, which occurs at –10 Ma

Offset (εt)0 Ma−10 Ma−20 Ma−30 Ma−40 Ma−50 Ma
R0.890.950.930.810.890.83
r20.790.910.870.660.790.69