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Salt beds in the Red River. The Red River is salty through tributaries above Lake Texoma. The saltiness is caused by a natural phenomenon that dates back to ancient times. About 250 million years ago, an inland sea blanketed parts of the region. As time passed, that sea evaporated, leaving salt deposits – mostly sodium chloride.
Salt beds in the Red River. The Red River that formed Lake Texoma is a saltwater river due to salt deposits left over from a 250-million-year-old former sea that was in the current Texas-Oklahoma border region. As time passed, that sea evaporated, leaving salts deposits — mostly sodium chloride. Rock and silt eventually buried the deposits ...
In Oklahoma, the light-colored limestone transitions gradually into red-colored sandstone and shale until the limestone is virtually nonexistent in north-central Texas. [5] The portion of the red beds with abundant fossil deposits is in Texas between the Red River and the Salt Fork Brazos River. [6]
Deeply buried salt deposits and marine limestones under the coastal plain also date from the Jurassic, when the first shallow seas formed. [7] The late Mesozoic record is much richer. Cretaceous rocks—particularly those of the Lower Cretaceous—are widespread at the surface, with yet more buried under the coastal plain.
The reservoir was created by the damming of the Red River of the South, which (along with several of its tributaries) receives large amounts of salt from natural seepage from buried deposits in the upstream region. The salinity is high enough that striped bass, a fish normally found only in salt water, has self-sustaining populations in the lake.
The stromatolites found today are almost all carbonate rocks (made of limestone), but these structures are mostly composed of the minerals gypsum and halite (rock salt), Hynek said.
The Salt Fork Red River is a sandy-braided stream about 311 km (193 mi) long, heading on the Llano Estacado of West Texas about 2.9 km (1.8 mi) north of Claude of Armstrong County, Texas, flowing east across the Texas Panhandle and Western Oklahoma to join the Red River about 21 km (13 mi) south of Altus of Jackson County, Oklahoma.
In the Permian geologic period, North-Central Texas was a part of the western coastal zone of equatorial Pangea, a super-continental land mass. [1] Nearby uplifts and mountainous regions, such as the Muenster Arch and Red River Uplift, the Wichita, Arbuckle, and Ouachita mountains developed by the end of the Pennsylvanian, [2] providing elevated topography to the north and east during the Permian.