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Cedar Mesa Sandstone
Cedar Mesa Sandstone (also known as the Cedar Mesa Formation) is a sandstone member〔The Cutler Formation is sometimes classified as the Cutler Group, in which case Cedar Mesa Sandstone is classified as a formation rather than a member.〕 of the Cutler Formation, found in southeast Utah, southwest Colorado, northwest New Mexico, and northeast Arizona.
Cedar Mesa Sandstone is the remains of coastal sand dunes deposited about 245–286 million years ago, during the early Permian period.〔(【引用サイトリンク】title=Canyonlands National Park - Cedar Mesa Sandstone )〕 Coloration varies, but the rock often displays a red and white banded appearance as a result of periodic floods which carried iron-rich sediments down from the Uncompahgre Mountains during its formation.〔〔(【引用サイトリンク】title=Canyonlands National Park - Geologic Formations )〕
Named after Cedar Mesa near the San Juan River in Utah,〔 exposures of Cedar Mesa Sandstone form the spires and canyons found in the Needles and Maze districts of Canyonlands National Park,〔 the inner gorge of White Canyon,〔(【引用サイトリンク】title=Geological Survey Circular 217 - Preliminary Report on the White Canyon Area, San Juan County, Utah )〕 and the three natural bridges of Natural Bridges National Monument.
==See also==
* Geology of the Canyonlands area
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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