Marsh and Intertidal Mud Deposits (VAm;0)

State	Virginia
Name	Marsh and Intertidal Mud Deposits
Geologic age	Quaternary
Original map label	m
Comments	Coastal Plain Holocene (Karen Hostettler) From expanded explanation (ref. VA002): Marsh and intertidal mud deposits (Holocene). Medium to dark-gray soft mud, and grayish-brown peat, comprising sediment of marshes in coastal areas and Chesapeake Bay; thickness is 0 to 10 feet. Also, sandy mud and muddy fine sand, light- to dark-gray. Locally, contains abundant shell material characterized by Crassostrea virginica and Mercenaria mercenaria. Comprises sediments of shallow bays and flats in area of Atlantic coastal lagoons of the Eastern Shore.
Primary rock type	clay or mud
Secondary rock type	silt
Other rock types
Lithologic constituents	Major Unconsolidated > Fine-detrital > Silt Unconsolidated > Fine-detrital > Clay
Map references	Digital Representation of the 1993 Geologic Map of Virginia", 2003, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, viewing software not included. This is a digital version of "Geologic Map of Virginia" published in 1993. Available from: https://www.dmme.virginia.gov/commerce/ [https://www.dmme.virginia.gov/commerce/]
Unit references	Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000 Digital Representation of the 1993 Geologic Map of Virginia - expanded explanation: 2003, Commonwealth of Virginia, Department of Mines, Minerals, and Energy, Divsion of Mineral Resources, Publication 147, 85 pp Digital Representation of the 1993 Geologic Map of Virginia", 2003, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, viewing software not included. This is a digital version of "Geologic Map of Virginia" published in 1993. Available from: https://www.dmme.virginia.gov/commerce/ [https://www.dmme.virginia.gov/commerce/]
Geographic coverage	Accomack - Gloucester - Lancaster - Mathews - Northampton - Northumberland - York - Chesapeake - Hampton - Poquoson - Virginia Beach