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In the Permian area of north-central Texas, in south-central Wilbarger County, there is abnormal deformation which has been known to geologists for several years, but which has not been adequately described. There is approximately 250 feet of uplift accompanied by faults. The closed part of the structure occupies an area of approximately 2 square miles. An analysis of the data, both surface and subsurface, shows that all the movement occurred above a depth of 1,200 feet. The accepted causes of folding for this region do not explain the observed facts at this dome, and the conclusion is drawn that the folding, which was shallow, was due to a movement of shales impregnated with gypsum toward a point of weakness, in a manner similar to the formation of gypsum and salt domes. /P>
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