Windsor Formation

Windsor Formation (lower Pleistocene or upper Pliocene, Coch, 1968). Gray and yellowish- to reddish-brown sand, gravel, silt, and clay. Constitutes surficial deposits of extensive plain (altitude 85-95 feet.) seaward of Surry scarp and of coeval, fluvial-estuarine terraces west of scarp. Fining upward sequence beneath plain consists of a basal pebbly sand grading upward into cross-bedded, quartzose sand and massive, clayey silt and silty clay; lower and upper parts of sequence were deposited, respectively, in shallow-marine or open-bay and restricted-bay or lagoonal environments. In terraces west of Surry scarp, fluvial-estuarine deposits comprise muddy, coarse, trough cross-bedded sand and gravel grading upward to sandy silt and clay. Thickness is 0 to 40 feet.
State Virginia
Name Windsor Formation
Geologic age Tertiary-Quaternary
Lithologic constituents
Unconsolidated > Fine-detritalsilt and clay
Unconsolidated > Coarse-detritalgravel and sand
Comments Coastal Plain

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 Caroline - Charles City - Chesterfield - Dinwiddie - Essex - Fairfax - Gloucester - Greensville - Hanover - Henrico - Isle of Wight - James City - King and Queen - King George - King William - Lancaster - Mathews - Middlesex - Northumberland - Prince George - Prince William - Richmond - Southampton - Spotsylvania - Stafford - Surry - Sussex - Westmoreland - York - Colonial Heights - Emporia - Franklin - Fredericksburg - Hopewell - Newport News - Petersburg - Richmond - Suffolk - Williamsburg