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Finlay Limestone

Finlay Limestone
State Texas
Name Finlay Limestone
Geologic age Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean Albian]
Comments In Eastern part of Trans-Pecos and High Plains: Cliff-forming limestone along Rio Grande, underlies Del Norte Fm. Nodular and massive limestone with thin shaly partings. in Finlay Mtns 200 +-ft; Devil Ridge 600 ft; Kent area 15-40 ft. Thickness 426 ft. in Sierra de Juarez, Chihuahua, MX. In Western part of Trans-Pecos Texas: in Quitman and Eagle Mtns. underlies Benevides Fm. Gray, ls, alternating resistant and recessive beds, fine-grained, some cherty beds, and thick beds some siltst and sandst near base; 700 +-ft; Van Horn Mtns 175 ft; Wiley Mtns area 110-170 ft. In Davis Mtns metasedimentary marble and quartzite, tightly folded, probably Finlay Ls
Primary rock type limestone
Secondary rock type siltstone
Other rock types sandstone
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Map references
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
Unit 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.
Counties Crockett - Culberson - Hudspeth - Jeff Davis - Presidio - Reeves