| State | Texas |
|---|---|
| Name | Gorman Formation |
| Geologic age | Early Ordovician |
| Lithologic constituents | Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
|
| Comments | Limestone and dolomite, thickly to thinly bedded, cherty; ls. chiefly in upper part, aphanitic, v. lt-gray; dolomite mostly present in lower part, microgranular to fine-grained, various shades of pink, gray, and yellowish-gray; v. sparsly fossiliferous, Archaeoscyphia structure preserved in chert nodules common in a bed near middle; thickness 425 to 490 ft where overlain by Honeycut Fm., in area of truncation completely eroded locally. |
| Stratigraphic units | Ellenberger Group |
| References | Bureau of Economic Geology, 1981, Llano sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.Bureau of Economic Geology, 1976, Brownwood sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, 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 | Blanco - Burnet - Gillespie - Kimble - Lampasas - Llano - McCulloch - Mason - Menard - San Saba |