Skip to main content

High Terraces

tan to orange clay, silt, and sand with a large amount of basal gravels. Overlain by 1-9 meters of loess.
State Louisiana
Name High Terraces
Geologic age Phanerozoic | Cenozoic | Quaternary | Pleistocene
Comments Surfaces are highly dissected and less continuous than lower terraces. Composed of terraces fomerly designated as Williana, Citronelle, and the highest Bentley. Where overlain by loess, this unit has a red dotted overlay pattern on the source map. Polygons for this unit in our coverage which should have the loess overlay pattern are designated by "-l" being added to the base map unit symbol.
Primary rock type clay or mud
Secondary rock type silt
Other rock types sand; gravel
Lithologic constituents
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/.
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/.
Counties East Feliciana - Rapides - West Feliciana