Micrograph of Deformed Quartz Sandstone


This micrograph colorfully illustrates deformed quartz grains in a well-cemented quartz sandstone from the Cambrian Antietam Formation, a prominent geologic unit in the Blue Ridge geologic province.  Many of the individual sand grains are elongated (~horizontal orientation), but not recrystallized.  Photo taken in cross polarized light with the gypsum plate inserted.