Regions of general uniform slope, comparatively level and of considerable extent. [USGS Circ 1048]
This category is also used for interfluves and llanos.
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Calcrete uranium deposits in the Southern High Plains, USA

The Southern High Plains (SHP) is a new and emerging U.S. uranium province. Here, uranyl vanadates form deposits in Pliocene to Pleistocene sandstone, dolomite, and limestone