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Savanna Formation

Savanna Formation
State Arkansas
Name Savanna Formation
Geologic age Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Des Moinesian]
Comments Shale with interbedded sandstone and some economic coal beds. Approximately 1600 ft. maximum thickness Some economic coal prodution
Primary rock type shale
Secondary rock type sandstone
Other rock types coal
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Incidental
Sedimentary > Coal (Bed)
Map references
Haley, B. R., Glick, E. E., Bush, W. V.; Clardy, B. F.; Stone, C. G.; Woodward, M. B., Zachry, D.L., 1993, Geologic Map of Arkansas: U.S.Geological Survey Special Geologic Map. Scale 1:500K
Unit references
Haley, B.R., 1960, Coal resources of Arkansas: U. S. Geological Survey Bull., Report: B 1072-P, pp.795-831
Counties Crawford - Franklin - Johnson - Logan - Scott - Sebastian