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Douglas Group

Lawrence FM (base LA)- mostly gray shale and sandstone with minor red shale, coal, gray limestone and conglomerate, thickness ranges from 140ft to 250 ft. Stranger FM- five members containing sandstone, shale, and minor limestone, coal and conglomerate ranging from 100 ft. to 180 ft. thickness.
State Kansas
Name Douglas Group
Geologic age Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Virgilian]
Comments Total approximate thickness ranging from 240 ft. to 400 ft. in outcrop.
Primary rock type shale
Secondary rock type sandstone
Other rock types coal; limestone; conglomerate
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Incidental
Sedimentary > Coal (Bed)
Map references
Ross, J. A., 1991, Geologic Map of Kansas: Kansas Geological Survey, Univ. of Kansas Map M-23 Scale 1:500K.
Unit references
Ross, J. A., 1991, Geologic Map of Kansas: Kansas Geological Survey, Univ. of Kansas Map M-23 Scale 1:500K.
Zeller, D.E., ed., 1968, The Stratigraphic Succession in Kansas, State Geological Survey of Kansas Bull. 189.
Counties Anderson - Atchison - Chautauqua - Coffey - Doniphan - Douglas - Elk - Franklin - Greenwood - Jefferson - Johnson - Leavenworth - Montgomery - Osage - Shawnee - Wilson - Woodson - Wyandotte