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Manning Formation

Manning Formation
State Texas
Name Manning Formation
Geologic age Phanerozoic | Cenozoic | Tertiary | Eocene
Comments clay and sandstone, chiefly clay, massive to laminated, sl. carbonaceous or lignitic, bentonitic, tuffaceous, thin interbeds of tuffaceous siltst; sandst in upper part, v. fine to fine grained, silty, well bedded to crossbedded; in lower part tuffaceous, contains fossil wood; thickness 250-350 ft. In East Texas and Gulf Coast to Rio Grande: Quartz sand, clay, and lignite. Sand, fine to med. grained, lignitic, light gray, weathers med. gray. Clay, sandy, lignitic, brn-gray; weathers pal brn-gray. Lignite brnish-black, weathers brn-gray. Fossil wood abdt. Thickness 200 ft.
Primary rock type clay or mud
Secondary rock type sand
Other rock types bentonite; sandstone; siltstone; coal
Lithologic constituents
Major
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (Bed)
Incidental
Sedimentary > Coal > Lignite (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, 1967, Palestine Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Counties Angelina - Atascosa - Brazos - Burleson - Fayette - Gonzales - Grimes - Karnes - Lee - McMullen - Polk - Trinity - Tyler - Walker - Washington - Wilson