Blue Ridge province - The Geology of Virginia
 
    

C A T O C T I N   M E T A B A S A L T

Columnar jointing in metabasalt of the ~570 Ma Catoctin Formation exposed along the Skyline Drive, Shenandoah National Park, northern Virginia Blue Ridge province

Columnar jointing in metabasalt of the ~570 Ma Catoctin Formation exposed along the Skyline Drive, Shenandoah National Park, northern Virginia Blue Ridge province


 
    

~570 Ma Catoctin greenstone

Photomicrograph of Catoctin metabasalt (greenstone) from the Blue Ridge province. Plagioclase (p) phenocrysts in a fine-grained matrix (m) of chlorite, epidote, and magnetite. Field of View 5 mm x 33 mm, plane polarized light.


 
    

APPALACHIAN PLATEAU | VALLEY & RIDGE | BLUE RIDGE | PIEDMONT | COASTAL PLAIN
 

(3/8/99)