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Geologic units in Stephens county, Texas

Palo Pinto Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 0.3 % of this area
Palo Pinto Formation
Lithology: sandstone; shale; limestone
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
Home Creek Limestone and Colony Creek Shale, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 7 % 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 43 % of this area
Thrifty and Graham Formations, undivided
Lithology: shale; sandstone; limestone; mudstone; conglomerate
Wolf Mountain Shale (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 0.8 % of this area
Wolf Mountain Shale
Lithology: shale; sandstone; limestone
Winchell Limestone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 1 % of this area
Winchell Limestone
Lithology: limestone; shale
Sedwick Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers < 0.1 % of this area
Sedwick Formation
Lithology: mudstone; sandstone; limestone
Harpersville Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Virgil]) at surface, covers 18 % of this area
Harpersville Formation
Lithology: mudstone; sandstone; siltstone; limestone
Pueblo Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 11 % of this area
Pueblo Formation
Lithology: mudstone; sandstone
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 7 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Ranger Limestone and Placid Creek Shale, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]) at surface, covers 3 % of this area
Ranger Limestone and Placid Creek Shale, undivided
Lithology: shale; limestone
Sedwick and Moran Formations, undivided (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 0.7 % of this area
Sedwick and Moran Formations, undivided
Lithology: mudstone; sandstone; limestone
Moran Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 2 % of this area
Moran Formation
Lithology: mudstone; sandstone; limestone
Antlers Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 2 % of this area
Antlers Sand
Lithology: sand; clay or mud; conglomerate; sandstone; claystone

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Page Last modified: 11:25 on 07-Jan-2014