USGS - science for a changing world

Mineral Resources On-Line Spatial Data

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

Cloverly, Morrison, Sundance, and Gypsum Spring Formations and Nugget Sandstone

CLOVERLY, MORRISON, AND SUNDANCE (Js), GYPSUM SPRING FORMATIONS, AND NUGGET SANDSTONE (J@n). CLOVERLY FORMATION--Rusty sandstone at top, underlain by brightly variegated bentonitic claystone; chert-pebble conglomerate locally at base. MORRISON FORMATION--Dully variegated claystone, nodular limestone, and gray silty sandstone. In southern Yellowstone and Jackson Hole areas the presence of Morrison is questionable. SUNDANCE FORMATION--Greenish-gray glauconitic sandstone and shale, underlain by red and gray nonglauconitic sandstone and shale. GYPSUM SPRING FORMATION--Interbedded red shale, dolomite, and gypsum. In north Wyoming wedges out south in T. 39 N. NUGGET SANDSTONE--Gray to dull-red, crossbedded quartz sandstone.
StateWyoming
NameCloverly, Morrison, Sundance, and Gypsum Spring Formations and Nugget Sandstone
Geologic agePhanerozoic | Mesozoic | Triassic(?) Jurassic(?) Cretaceous-Early
Original map labelK@
Primary rock typefine-grained mixed clastic
Secondary rock typemedium-grained mixed clastic
Other rock typescarbonate; dolostone (dolomite)
Lithologic constituents
Minor
Sedimentary > Chemical > Evaporite > Gypsum
Sedimentary > Carbonate > Dolostone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Conglomerate
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Sandstone
Incidental
Sedimentary > Chemical > Chert
Sedimentary > Clastic > Mudstone > Claystone > Bentonite
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 coverageFremont

Show this information as [XML] - [JSON]

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=WYKTR;0
Page Contact Information: Peter Schweitzer