Gorman Formation

Gorman Formation
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