| State | Texas |
|---|---|
| Name | Bonham Formation |
| Geologic age | Late Cretaceous; Gulfian Series |
| Lithologic constituents | Major
Sedimentary > Carbonate > Marlstone (Bed)
Sedimentary > Clastic > Mudstone > Claystone (Bed)
|
| Comments | marl and clay, silty, glauconitic, most abdt near middle, poorly to thinly bedded, med to lt gray; weathers lt gray to yell-gray; marine megafossils, thickness 400 +- ft. |
| References | Bureau of Economic Geology, 1967, Sherman Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000. |
| NGMDB product | |
| Counties | Fannin - Grayson - Lamar - Red River |