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Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > Geology > by state > Louisiana

Jackson Group (undifferentiated)

light gray to brown liginitic clays with thin interbeds of limonitic sands or lignite; near base,calcareous, glauconitic, and fossiliferous beds may weather to black soil. Overlain by 1-9 meters of loess.
StateLouisiana
NameJackson Group (undifferentiated)
Geologic agePhanerozoic | Cenozoic | Tertiary | Eocene
Original map labelEj-l
CommentsWhere 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 typeclay or mud
Secondary rock typesand
Other rock typescoal
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/.
Geographic coverageCaldwell - Catahoula

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=LAEOj-l;0
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