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The Woodbine Group is a geological formation in east Texas whose strata date back to the Early to Middle Cenomanian age of the Late Cretaceous. [1] It is the producing formation of the giant East Texas Oil Field (also known as the "Black Giant") from which over 5.42 billion barrels of oil have been produced. [3]
The East Texas iron ore belt spans several counties, including Cherokee, Upshur, Camp, Gregg, Harrison, and others. The geology of the region is dominated by the Weches greensand, which consists of glauconitic sand and clay. This greensand is underlain by various sedimentary formations, including the Queen City sand member and the Sparta sand.
Map showing distribution of Haynesville Shale within East Texas and northwest Louisiana. The Haynesville Formation consists of marine and coastal plain limestone, shale, mudstone, and sandstone. In addition to the Haynesville Shale, the Haynesville Formation contains two formal subdivisions, which geologists call members. They are the Gilmer ...
Texas is approximately bisected by a series of faults that trend southwest to northeast across the state, from the area of Uvalde to Texarkana.South and east of these faults, the surface exposures consist mostly of Cenozoic sandstone and shale strata that grow progressively younger toward the coast, indicative of a regression that has continued from the late Mesozoic to the present.
East Mountain Shale: Carboniferous: Edwards Limestone: Cretaceous: Edwards Group/Segovia Formation: Cretaceous: El Paso Formation: Ordovician: El Paso Group/Florida Formation: Ordovician: El Paso Group/McKelligon Canyon Formation: Ordovician: El Paso Group/Padre Formation: Ordovician: El Paso Group/Scenic Drive Formation: Ordovician: El Picacho ...
The shale overlying the Bells Sandstone has been named the Maribel Shale [5] Fossils that occur in the Arcadia Park include shark's teeth and other fish remains, ammonites, inoceramid clams, oysters, and foraminifera. [1] The Sub-Clarksville Sandstone is a conventional source of oil production in East Texas. [6]
Sandstone modal compositions and detrital zircon U‐Pb analyses of the Wilcox Group indicate long‐distance sediment transport from primarily volcanic and basement sources to the west, northwest, and southwest. The Wilcox Group represents the earliest series of major post‐Cretaceous pulses of sand deposition along the western margin of the ...
The lower sandstone beds tend to form a prominent cliff. The total thickness varies from 45–210 feet (14–64 m). The formation overlies the Tecovas Formation. [1] The Cuervo Sandstone Member is preempted by the Trujillo Formation. [3] The formation crops out along Palo Duro Canyon and the Canadian River and their tributaries. [1]