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

Midway Group (undifferentiated)

dark gray to black shale
StateLouisiana
NameMidway Group (undifferentiated)
Geologic agePhanerozoic | Cenozoic | Tertiary | Paleocene
Original map labelPm
CommentsOnly at surface in northwest Caddo Parish and at Prothro and Rayburns salt domes in Bienville Parish.
Primary rock typeshale
Secondary rock type
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
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 coverageBienville - Caddo

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