Figure F2. Estimates of thermal gradient and maximum temperatures assuming end-member values of basal heat flux (28 and 100 mW/m2) and using the measured sediment thermal conductivities obtained during Leg 180 drilling for a range of sites. Maximum calculated sediment temperatures are predicted to be ~85°C—observed temperatures are significantly less than this value. Measured maximum temperatures range from 28° and 31°C for Sites 1115 and 1109, respectively. Sites 1108 and 1118 have maximum temperature gradients of 100°and 60°C km-1. Such sediment temperatures are ineffective in affecting vitrinite reflectance.

Figure F2. Estimates of thermal gradient and maximum temperatures assuming end-member values of basal heat flux (28 and 100 mW/m²) and using the measured sediment thermal conductivities obtained during Leg 180 drilling for a range of sites. Maximum calculated sediment temperatures are predicted to be ~85°C—observed temperatures are significantly less than this value. Measured maximum temperatures range from 28° and 31°C for Sites 1115 and 1109, respectively. Sites 1108 and 1118 have maximum temperature gradients of 100°and 60°C km^-1. Such sediment temperatures are ineffective in affecting vitrinite reflectance.