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Geology |
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| Millions of years ago, major river systems ran through the Anticline area depositing more than 5,000 feet of sand and sediment. Over time, these deposits became over-pressured, gas-charged and buried by at least 9,000 additional feet of sediment. This process resulted in the deposition of more than 5,000 gross feet of gas-rich, but highly discontinuous sand sediments in parts of the area. The gas was trapped by the formation of an anticline – an arch of stratified, dense rock in which the layers bend downward in opposite directions from the crest (similar to an upside-down bowl). In Pinedale, the Anticline formed during the Cretaceous Age trapping gas at depths of 7,000 to 20,000 feet.
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  Pictured above, a rock outcrop showing the shape of an anticline. An anticline is an arch of stratified, dense rock in which the layers bend downward in opposite directions from the crest (similar to an upside-down bowl). |
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