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

Geologic units in Bastrop county, Texas

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 5 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 3 % of this area
high gravel deposits
Lithology: gravel; silt; sand
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 3 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Willis Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene) at surface, covers 0.3 % of this area
Willis Formation
Lithology: clay or mud; silt; sand; gravel
Simsboro Formation (Phanerozoic | Cenozoic | Tertiary | Paleocene) at surface, covers 4 % of this area
Simsboro Formation
Lithology: sand; mudstone
Midway Group, undivided (Phanerozoic | Cenozoic | Tertiary | Paleocene) at surface, covers 3 % of this area
Midway Group, undivided
Lithology: fine-grained mixed clastic; limestone; mudstone
Hooper Formation (Phanerozoic | Cenozoic | Tertiary | Paleocene) at surface, covers 6 % of this area
Hooper Formation
Lithology: mudstone; sandstone
Navarro and Taylor Groups, undivided (Phanerozoic | Mesozoic | Cretaceous-Late [Gulfian]) at surface, covers < 0.1 % of this area
Navarro and Taylor Groups, undivided
Lithology: clay or mud; fine-grained mixed clastic; sandstone; limestone
Yegua Formation (Phanerozoic | Cenozoic | Tertiary | Eocene-Middle) at surface, covers 1 % of this area
Yegua Formation
Lithology: clay or mud; sandstone; limestone; coal
Weches Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 2 % of this area
Weches Formation
Lithology: sand; clay or mud
Sparta Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 6 % of this area
Sparta Sand
Lithology: sand; clay or mud; silt; sandstone; coal
Reklaw Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 8 % of this area
Reklaw Formation
Lithology: sandstone; clay or mud
Queen City Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 9 % of this area
Queen City Sand
Lithology: sandstone; siltstone; clay or mud; sand
Calvert Bluff Formation (Phanerozoic | Cenozoic | Tertiary | Paleocene Eocene) at surface, covers 12 % of this area
Calvert Bluff Formation
Lithology: mudstone; sandstone; coal
Cook Mountain Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 1 % of this area
Cook Mountain Formation
Lithology: clay or mud; sandstone; coal
Carizzo Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 6 % of this area
Carizzo Sand
Lithology: sandstone

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Page Last modified: 13:39 on 25-Apr-2014