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Louis S. Gardner

Publications and source records attributed to Louis S. Gardner.

3 recordsLinked to original sources
USGS1967

Phichit gypsum deposit, central Thailand

An extensive deposit of white, granular, massive gypsum has been discovered in central Thailand. The gypsum, a part of the Mesozoic Korat group, was deposited along with salt by evaporation of sea water in shallow basins extensively developed in Thailand and adjacent parts of Laos. It now occurs in a narrow, deep downfaulted block enclosed within a complex of Paleozoic sedimentary rocks and younger volcanic rocks, and is bounded to the east and west by north-trending high-angle faults. During downfaulting to its present position, the gypsum was altered to anhydrite. The upper part of the deposit has been reconverted to gypsum during the present cycle of erosion to depths of about 80-120 feet. Total reserves may exceed 25 million tons of gypsum with perhaps 10 times as much anhydrite.

Central Thailand↗
USGS1967

Salt resources of Thailand

In recent years beds of rock salt, as much as 820 feet thick, have been found in the subsurface of northeastern Thailand in a thick sequence of 'red beds' of the Maha Sarakam formation at the top of the Korat group of Mesozoic age. These salt-bearing rocks are widespread in the subsurface of northeastern Thailand and extend under the Mekong river into Laos to form one of the major salt-bearing regions of the world. The Korat group was deposited during Triassic, Jurassic and Cretaceous times on floodplains and in shallow estuaries, bays, or partly isolated coastal lakes over a large arid or semiarid region that lay near sea level and sank very slowly under remarkably uniform conditions. Total reserves are estimated at more than 2,700 billion tons of inferred rock salt in seven areas or deposits that include only about 20 percent of the total area of about 40,000 square kilometers probably underlain by salt-bearing rocks.

Northeastern Thailand↗