Natural and columnar sections at each end and in the center of a line 100 miles long and extending at…
Natural and columnar section to illustrate compound offlapping and overlapping series.
Section to illustrate the arrangement and change in facies in an offlapping series formed during a retreatal…
Well-rounded quartz grains from ancient eolian rock, enlarged by secondary addition of silica in optical…
Diagrammatic section to illustrate replacing overlap of shore or continental sands on the right and…