Skip to main content

DOUGLAS GROUP

DOUGLAS GROUP - cyclic deposits, dominantly shale with sandstone, and limestone.
State Missouri
Name DOUGLAS GROUP
Geologic age Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Upper Virgilian]
Comments Cyclic deposits, principally shale, sandy shale, sandstone, separated by limestone beds and minor coal
Primary rock type shale
Secondary rock type sandstone
Other rock types limestone; coal
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Coal (Bed)
Map references
Middendorf, M. A., and others, 2003, Geologic Map of Missouri: Missouri Geological Survey. Scale 1:500K
Unit references
Howe, W. B. and Koenig, 1961, The Stratigraphic Succession in Missouri: Missouri Geological Survey and Water Resources, Vol XL. 2nd Series.
Counties Andrew - Buchanan - Clay - Holt - Linn - Nodaway - Platte - Worth