Data release for the geologic map of the Weldona 7.5'
quadrangle, Morgan County, Colorado
The Weldona 7.5' quadrangle is located on the semiarid plains of
northeastern Colorado, along the South Platte River corridor where the
river has incised into Upper Cretaceous Pierre Shale. The Pierre Shale is
largely covered by surficial deposits that formed from alluvial, eolian,
and hillslope processes operating in …