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Fort Union Formation

FORT UNION FORMATION Tullock Member--Soft gray sandstone, gray and brown carbonaceous shale, and thin coal beds.
StateWyoming
NameFort Union Formation
Geologic agePhanerozoic | Cenozoic | Tertiary | Paleocene
Original map labelTft
CommentsOldest of the 3 Fort Union members
Primary rock typesandstone
Secondary rock typeshale
Other rock typescoal
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Coal
Map references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Unit references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Geographic coverageCampbell - Converse - Crook - Johnson - Natrona - Niobrara - Sheridan - Weston

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