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 in 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	Phanerozoic \| Mesozoic \| Jurassic-Middle Jurassic-Late(?) Cretaceous-Early
Original map label	KJk
Primary rock type	fine-grained mixed clastic
Secondary rock type	medium-grained mixed clastic
Other rock types	limestone; conglomerate
Lithologic constituents	Minor Sedimentary > Clastic > Siltstone Sedimentary > Clastic > Mudstone Sedimentary > Clastic > Mudstone > Shale Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Conglomerate Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Clastic > Sandstone
Map references	Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey. [http://pubs.er.usgs.gov/publication/ofr83802]
Unit references	Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey. [http://pubs.er.usgs.gov/publication/ofr83802]
Geographic coverage	Park