Tidal Marsh (SCQtm;1)

Tidal Marsh: Peat and muck deposits along tidal margins of esturaries and back bays. Deposits range from a few feet to 60+ feet deep. Locally include silt and fine sand and clay as levees on tidal channels. At depth peaty material may be accumulated from fresh water plants. Peat at the surface dominated by spartina and other salt tolerant species.

State	South Carolina
Name	Tidal Marsh
Geologic age	Quaternary
Original map label	Qtm
Primary rock type	peat
Secondary rock type	silt
Other rock types	sand; clay or mud
Lithologic constituents	Major Unconsolidated > Peat Minor Unconsolidated > Fine-detrital > Clay Unconsolidated > Coarse-detrital > Sand Unconsolidated > Fine-detrital > Silt
Map references	Newell, Wayne L., Prowell, David (retired), Krantz, David, Powars, David, Mixon, Robert (retired), Stone, Byron, and Willard, Debra, in review, Surficial Geology and Geomorphology of the Atlantic Coastal Plain: U.S.G.S. Open File Report,
Unit references	Newell, Wayne L., Prowell, David (retired), Krantz, David, Powars, David, Mixon, Robert (retired), Stone, Byron, and Willard, Debra, in review, Surficial Geology and Geomorphology of the Atlantic Coastal Plain: U.S.G.S. Open File Report,
Geographic coverage	Beaufort - Berkeley - Charleston - Clarendon - Colleton - Dorchester - Georgetown - Jasper - Williamsburg