| State | Texas |
|---|---|
| Name | Tarantula Gravel |
| Geologic age | Miocene |
| Lithologic constituents | Major
Unconsolidated > Coarse-detrital > Gravel (Colluvial)
|
| Comments | Composition related to rock types in nearby area; upper part: fragments of subrounded tuff, trachyte, basalt, and ignimbrite; lower part; subrounded to rounded quartzite and limestone pebbles and cobbles probably derived from basal conglomerate of Colmena Formation; occures southwest of Van Horn Mtns. in northern Rim Rock County; thickness up to approx.400 ft. |
| References | Bureau of Economic Geology, 1979, Marfa Sheet, Geologic Atlas of Texas: Bureau of Economic Geology and The 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 | Culberson - Hudspeth - Jeff Davis - Presidio |