Fingers Formation

Fingers Formation
State Texas
Name Fingers Formation
Geologic age Pliocene
Lithologic constituents
Major
Sedimentary > Clastic > Conglomeratepoorly consolidated
Sedimentary > Clastic > Sandstonepoorly consolidated
Incidental
Sedimentary > Clastic > Siltstonesome sandy siltstone, poorly cemented
Comments (name not formalized) conglomerate and sandstone, poorly consolidated; in upper part mostly conglomerate, pebbles of tuff dominant; in middle part, mostly coarse quartz-poor arenite, some sandy siltstone, poorly cemented, cement mostly caliche-like, some spar; in lower part, large-pebble conglomerate, coarse sand matrix, pebbles mostly Tule Mountain Trachyandesite, red-brown; pebbles very angular throughout; thickness up to 700 feet.
References

Bureau of Economic Geology, 1979, Emory Peak--Presidio Sheet, Geologic Atlas of Texas, University of Texas at Austin.

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 Brewster