| State | Texas |
|---|---|
| Name | Carrizo Mountain Group showing metasedimentary rocks |
| Geologic age | preCambrian (Proterozoic) |
| Lithologic constituents |
Major
Metamorphic > Schistlocally slaty, blue-gray
Minor
Sedimentary > Carbonate > Limestonelocally slaty, blue-gray
Metamorphic > Metasedimentary > Metaclastic > Quartzitefeldspathic meta-quartzite and meta-arkose in Carrizo Mountains, Eagle Mountains, and in Van Horn Mountains and Wylie Mountain area (include lenses of biotite schist and amphibolite)
Incidental
Metamorphic > Metasedimentary > Metaclastic > Phyllitelocally slaty, blue-gray
|
| Comments | comprises many rock types including limestone, chlorite-quartz-albite-clacite rock, phyllite, feldspathic meta-quartzite and meta-arkose, chlorite-mica schist, and interlayered sericite schist(including lenses of biotite schist and amphibolite), metaquartzite, chert, phyllite, slate, and limestone |
| 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 |