|Lyons Sandstone, Denver Basin
The geothermal gradient in the Denver Basin ranges from 30 °to 40 °C/km (1.65° to 2.2° F/100 ft) (Sorey and Reed, 1984, in Belitz and Bredehoeft, 1988). The depth map of the Lyons Sandstone was used with the geothermal gradient to calculate the brine temperature for the Lyons Sandstone in the GIS data base.
Belitz, K., and Bredehoeft, J., 1988, Hydrodynamics of Denver Basin: explanation of subnormal fluid pressures: American Association of Petroleum Geologists Bulletin, v. 72, no. 11, p. 1334-1359.