Click on image for enlargement.

Figure 11. Bebout and Gutierrez (1983) cross section R-R' in southeastern Louisiana. The approximate onset of oil generation at 0.6% Ro corresponds to the present-day down-hole temperature of 200°F (93°C) using the general relationship of vitrinite reflectance to temperature established by Barker and Pawlewicz (1986) from worldwide basins.