Kootenai and Morrison Formations and Ellis Group (WYKJk;0)

Kootenai and Morrison Formations and Ellis Group

Kootenai Formation - Rusty thin-bedded sandstone, grayish-red soft claystone, white limestone, and chert-pebble conglomerate. Morrison Formation (Northern Yellowstone area) - Variegated silty claystone and fine-grained sandstone. Ellis Group - includes Swift, Rierdon, and Sawtooth Formations. Swift Formation - Calcareous glauconitic sandstone and sandy limestone. Rierdon Formation - Mudstone, siltstone, shale, and basal limestone. Sawtooth Formation - Red beds and limestone.

State	Wyoming
Name	Kootenai and Morrison Formations and Ellis Group
Geologic age	Middle Jurassic-Lower Cretaceous
Lithologic constituents	Major Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Clastic > Sandstone Minor Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Conglomerate Sedimentary > Clastic > Siltstone Sedimentary > Clastic > Mudstone
References	Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000. https://pubs.er.usgs.gov/publication/70046739
NGMDB product	NGMDB product page for 16366
Counties	Park

Kootenai and Morrison Formations and Ellis Group

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.