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Salt comes from two main sources: sea water, and the sodium chloride mineral halite (also known as rock salt). Rock salt occurs in vast beds of sedimentary evaporite minerals that result from the drying up of enclosed lakes, playas, and seas. Salt beds may be up to 350 metres (1,150 ft) thick and underlie broad areas.
In 1641, Samuel Winslow was granted the first patent in North America by the Massachusetts General Court for a new process for making salt. [ 1 ] [ 2 ] See also
Heads of families could purchase a half-bushel of salt for $2.50. If a widow had a son in the Confederate army, the price was only $1.00. But if the widow's husband had served his nation, the price was free. Local court clerks sent salt requests to the state government, which in turn allotted salt to the counties as requested. [4]
The Morrison Formation is the best source of Jurassic mammal fossils in North America. [67] Local dinosaurs included the ornithopod Camptosaurus, the sauropods Apatosaurus and Diplodocus, and the theropod Allosaurus. [68] Unlike many periods of geologic history the Jurassic did not end in a mass extinction.
Diorama of an underground salt mine in Germany. Inside Salina Veche, in Slănic, Prahova, Romania.The railing (lower middle) gives the viewer an idea of scale. Before the advent of the modern internal combustion engine and earth-moving equipment, mining salt was one of the most expensive and dangerous of operations because of rapid dehydration caused by constant contact with the salt (both in ...
Strataca is a salt mine museum in Hutchinson, Kansas, United States.It was previously known as the Kansas Underground Salt Museum.The museum is built within one of the world's largest deposits of rock salt, formed 275 million years ago, and provides the opportunity to go 650 feet (200 m) beneath the Earth’s surface.
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Louann Salt stratigraphic column for Texas. The Louann Salt is a widespread evaporite formation that formed in the Gulf of Mexico during the Callovian in the mid Jurassic. [1] The Louann formed in a rift as the South American and North American Plates separated, from an embayment of the Pacific Ocean. [1]