Valley and Ridge province - The Geology of Virginia
 
    
C A M B R O - O R D O V I C I A N   C A R B O N A T E S

Flat-lying Cambrian carbonates exposed at Natural Chimneys Regional Park, Augusta County

Flat-lying Cambrian carbonates exposed at Natural Chimneys Regional Park, Augusta County
 
    

Interbedded limestone and dolomite

Close-up of interbedded limestone (blue-gray) and dolomite (beige) from the Shenandoah Valley. This rock formed from limey mud deposited in a shallow tropical ocean approximately 500 million years ago.
 
    

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

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