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The AAPG/Datapages Combined Publications Database
Utah Geological Association
Abstract
Wyoming Trona in 1985
Abstract
The Green River Basin of southwestern Wyoming contains 134.4 billion tons of minable trona and mixed trona and halite. This is enough to supply the current world demand for soda ash (refined trona) for about 2,000 years.
The resource formed as bedded evaporite deposits precipitated from saline waters of Lake Gosiute, a large Eocene lake. The Wilkins Peak Member of the Green River Formation represents the closed-lake-basin stage of Lake Gosiute.
Trona mining began in 1947 and has continued to the present with dramatic growth in the late 1960’s and early 1970’s based on the use of soda ash in the manufacture of disposable glass bottles. Because use of such containers has decreased in recent years the growth-rate of the industry has slowed and production has declined.
Future growth depends on newly developed uses for soda ash, increased domestic consumption and development of an export market. High rail-transportation costs are currently thwarting efforts for expansion of both foreign markets and domestic markets in the eastern United States.
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