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Geologic units in Crockett county, Texas

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 9 % 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
sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.2 % of this area
sand sheet deposits
Lithology: sand; silt
playa deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.1 % of this area
playa deposits
Lithology: clay or mud; silt
Gatuna Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle(?)) at surface, covers < 0.1 % of this area
Gatuna Formation
Lithology: sand; conglomerate; evaporite; limestone; siltstone; shale
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers < 0.1 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Permian rocks, undivided (Phanerozoic | Paleozoic | Permian) at surface, covers < 0.1 % of this area
Permian rocks, undivided
Lithology: shale; sandstone; evaporite; dolostone (dolomite); siltstone
Washita Group (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean] Cretaceous-Late ) at surface, covers 0.2 % of this area
Washita Group
Lithology: clay or mud; limestone
Maxon Sandstone and Glen Rose Limestone, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.9 % of this area
Maxon Sandstone and Glen Rose Limestone, undivided
Lithology: sandstone; limestone
Fredericksburg Group (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]) at surface, covers < 0.1 % of this area
Fredericksburg Group
Lithology: limestone; mudstone; dolostone (dolomite); chert
Finlay Limestone (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean Albian]) at surface, covers < 0.1 % of this area
Finlay Limestone
Lithology: limestone; siltstone; sandstone
Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.4 % of this area
Edwards Limestone
Lithology: limestone; dolostone (dolomite); chert
Buda Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 5 % of this area
Buda Limestone
Lithology: limestone
Bouquillas Formation (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers 0.2 % of this area
Bouquillas Formation
Lithology: limestone; shale; mudstone; siltstone

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