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

Geologic units in Brown county, Texas

Winchell Limestone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 4 % of this area

Winchell Limestone

Lithology: limestone; shale

Travis Peak Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 10 % of this area

Travis Peak Formation

Lithology: conglomerate; sandstone; limestone

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 1.0 % of this area

sand, silt, clay, and gravel. locally indurated with calcium carbonate (caliche); includes point bar, natural levee, stream channel, sand dune, terrace, alluvial fan, landslide bolson and playa deposits

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

Harpersville Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Virgil]) at surface, covers 6 % of this area

Harpersville Formation

Lithology: mudstone; sandstone; siltstone; limestone

Paluxy Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 3 % of this area

Paluxy Sand

Lithology: sand; sandstone; limestone

Pueblo Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 3 % of this area

Pueblo Formation

Lithology: mudstone; sandstone

Santa Anna Branch Shale and Sedwick and Moran Formations, undivided (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers < 0.1 % of this area

Santa Anna Branch Shale and Sedwick and Moran Formations, undivided

Lithology: mudstone; shale; sandstone; limestone

Walnut Clay (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 2 % of this area

Walnut Clay

Lithology: clay or mud; limestone; shale

Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.7 % of this area

Edwards Limestone

Lithology: limestone; dolostone (dolomite); chert

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 1.0 % of this area

Terrace deposits

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

Twin Mountains Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 3 % of this area

Twin Mountains Formation

Lithology: sandstone; claystone; conglomerate

Glen Rose Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 6 % of this area

Glen Rose Limestone

Lithology: limestone; clay or mud; sandstone; conglomerate

Home Creek Limestone and Colony Creek Shale, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 3 % of this area

Home Creek Limestone and Colony Creek Shale, undivided

Lithology: shale; limestone; sandstone

Thrifty and Graham Formations, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Virgil]) at surface, covers 16 % of this area

Thrifty and Graham Formations, undivided

Lithology: shale; sandstone; limestone; mudstone; conglomerate

high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 0.3 % of this area

high gravel deposits

Lithology: gravel; silt; sand

Comanche Peak Limestone and Walnut Clay, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 2 % of this area

Comanche Peak Limestone and Walnut Clay, undivided

Lithology: limestone; mixed clastic/carbonate

Moran Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 1 % of this area

Moran Formation

Lithology: mudstone; sandstone; limestone

Antlers Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 5 % of this area

Antlers Sand

Lithology: sand; clay or mud; conglomerate; sandstone; claystone

undivided part Fredericksberg Group (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.2 % of this area

undivided part Fredericksberg Group

Lithology: clay or mud; limestone; mudstone; shale

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 4 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Cedarton Shale and Adams Branch Limestone, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 4 % of this area

Cedarton Shale and Adams Branch Limestone, undivided

Lithology: shale; sandstone; limestone

Ranger Limestone and Placid Creek Shale, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 4 % of this area

Ranger Limestone and Placid Creek Shale, undivided

Lithology: shale; limestone

Strawn Group (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atoka Des Moines]) at surface, covers 17 % of this area

Strawn Group

Lithology: shale; sandstone; clay or mud; sandstone; conglomerate; coal