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Mineral Resources > Online Spatial Data > Geology > by state > Texas Geology

Geologic units in Brazos county, Texas

high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 16 % of this area

high gravel deposits

Lithology: gravel; silt; sand

Whitsett Formation (Phanerozoic | Cenozoic | Tertiary | Eocene Oligocene) at surface, covers 2 % of this area

Whitsett Formation

Lithology: clay or mud; sandstone; siltstone; sand

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 23 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Cook Mountain Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 18 % of this area

Cook Mountain Formation

Lithology: clay or mud; sandstone; coal

Oakville Sandstone (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers < 0.1 % of this area

Oakville Sandstone

Lithology: sandstone; clay or mud

Catahoula Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 1 % of this area

Catahoula Formation

Lithology: mudstone; sand; tuff; sandstone; conglomerate

Manning Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 7 % of this area

Manning Formation

Lithology: clay or mud; sand; bentonite; sandstone; siltstone; coal

Wellborn Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 2 % of this area

Wellborn Formation

Lithology: sandstone; sand ; clay or mud; coal

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 8 % of this area

Terrace deposits

Lithology: terrace; sand; gravel; silt; clay or mud

Yegua Formation (Phanerozoic | Cenozoic | Tertiary | Eocene-Middle) at surface, covers 20 % of this area

Yegua Formation

Lithology: clay or mud; sandstone; limestone; coal

Sparta Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area

Sparta Sand

Lithology: sand; clay or mud; silt; sandstone; coal

Cadell Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 2 % of this area

Cadell Formation

Lithology: siltstone; clay or mud; sandstone; sand