Plateaus

Comparatively flat areas of great extent and elevation; specif. extensive land regions considerably above the adjacent country or above sea level; commonly limited on at least one side by an abrupt descent, have flat or nearly smooth surfaces but are often dissected by deep valleys and surmounted by high hills or mountains, and have a large part of their total surface at or near the summit level. [Glossary of Geology, 4th ed.]
This category is also used for table mountains and tablelands.
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Element concentrations in surface soils of the Coconino Plateau, Grand Canyon region, Coconino County, Arizona

Geochemical analysis of 47 elements in more than 700 soil samples that appeared to be unaffected by mineralization or anthropogenic contamination.