Prairie Terraces (LAQtp;0)

State	Louisiana
Name	Prairie Terraces
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Pleistocene
Original map label	Qtp
Comments	Surfaces generally show little dissection and are topographically higher than the Deweyville. Three levels are recognized:two along alluvial valleys, the lower coalescing with its broad coastwise expression;the third, still lower, found intermittently gulfward.
Primary rock type	clay or mud
Secondary rock type	silt
Other rock types	sand; gravel
Lithologic constituents	Major Unconsolidated > Coarse-detrital > Sand (Terrace, stream) Unconsolidated > Fine-detrital > Silt (Terrace, stream) Unconsolidated > Fine-detrital > Clay (Terrace, stream) Minor Unconsolidated > Coarse-detrital > Gravel (Terrace, stream)
Map references	United States Geological Survey, 1998, Digital Overlay of the Geologic Map of Louisiana: U.S. Geological Survey, Biological Resources Division, National Wetlands Research Center, Product Id USGS-NWRC 1984-02-0001, http://www.nwrc.usgs.gov/. [http://www.nwrc.usgs.gov/.]
Unit references	United States Geological Survey, 1998, Digital Overlay of the Geologic Map of Louisiana: U.S. Geological Survey, Biological Resources Division, National Wetlands Research Center, Product Id USGS-NWRC 1984-02-0001, http://www.nwrc.usgs.gov/. [http://www.nwrc.usgs.gov/.]
Geographic coverage	Acadia - Allen - Ascension - Avoyelles - Beauregard - Bienville - Bossier - Caddo - Calcasieu - Caldwell - Cameron - Catahoula - Claiborne - De Soto - East Baton Rouge - Evangeline - Franklin - Grant - Jackson - Jefferson Davis - Lafayette - La Salle - Lincoln - Livingston - Morehouse - Natchitoches - Ouachita - Rapides - Red River - Sabine - Saint Helena - Saint Landry - Saint Tammany - Tangipahoa - Union - Vermilion - Vernon - Washington - Webster - Winn