Miocene Sand and Gravel

Fine- to coarse-grained sand, sandy gravel, silt, and clay, gray to light-yellowish-gray, commonly oxidized to yellowish-orange and yellowish-brown; pebbles and cobbles are deeply etched. Commonly caps interfluves at northwestern edge of Coastal Plain and constitutes thin Coastal Plain outliers in easternmost Piedmont where deposits directly overlie weathered crystalline rocks. In part, may represent a fluvial to marginal-marine facies of the Choptank Formation. Thickness is 0 to 30 feet.
State Virginia
Name Miocene Sand and Gravel
Geologic age Tertiary
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sand
Unconsolidated > Coarse-detrital > Gravel
Minor
Unconsolidated > Fine-detrital > Silt
Unconsolidated > Fine-detrital > Clay
Comments Coastal Plain
References

Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.

Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.

NGMDB product
Counties Arlington - Caroline - Fairfax - Hanover - Prince William - Spotsylvania - Stafford - Falls Church