Colorado River Basin Stratigraphy

Lexicon of Colorado Plateau Stratigraphy

Below is a list of named stratigraphic units described in USGS publications and other sources.

Aztec Sandstone
Barker Dome Tongue (Cliffhouse Ss.)
Bass Formation
Baxter Formation
Bidahochi Formation
Bitter Ridge Member (Horse Spring Fm.)
Black Box Formation
Blair Formation
Black Dragon Member (Moenkopi Fm.)
Blue Gate Member (Mancos Shale)
Boat Mesa Formation
Bonanza King Formation
Brady Canyon Member (Toroweap Fm.)
Bridger Formation
Bright Angel Shale
Browns Park Formation
Brushy Basin Member (Morrison Fm.)
Buck Tongue (Mancos Shale)
Burrow Canyon Formation
Caanon Peak Formation
Callville Formation
Cannonville Member (Entrada Formation)
Cardenas Lava
Carmel Formation
Castlegate Sandstone
Cedar Mesa Sandstone
Cedar Mountain Formation
Chinle Formation
Chisholm Shale
Chuar Group
Church Rock Member (Chinle Fm.)
Claron Formation
Cliffhouse Sandstone Member (Mesaverde Fm.)
Coconino Sandstone
Colton Formation
Co-op Canyon Member (Carmel Fm.)
Crystal Creek Member (Carmel Fm.)
Curtis Formation
Cutler Group (Formation)
Dakota Sandstone
De Chelley Sandstone
Dinosaur Canyon Member (Moenave Fm.)
Dinwoody Formation
Doughnut Shale
Dox Sandstone
Drip Tank Member (Straight Cliffs Fm.)
Duchesne River Formation
Dunderberg Shale
Elephant Canyon Formation
Entrada Sandstone
Ericson Sandstone (Mesaverde Group)
Escalante Member (Entrada Fm.)
Esplande Formation
Ferron Sandstone Member (Mancos Shale)
Flagstaff Limestone
Fort Union Formation
Fossil Mountain Member (Kaibab Ls.)
Frenchman Mountain Dolomite
Frontier Formation
Galeros Formation
Glen Canyon Group
Grand Canyon Supergroup
Green River Formation
Gunsight Butte Member (Entrada Fm.)
Hakatai Shale
Halgaito Member (Cutler Fm.)
Harrisburg Member (Kaibab Ls.)
Hermit Shale
Hermosa Group
Holbrook Member (Moenkopi Fm.)
Honaker Trail Formation
Horse Spring Formation
Hoskinnini Member (Moenkopi Fm.)
Hualapai Member (Muddy Creek Fm.)
Humbug Formation
John Henry Member (Straight Cliffs Fm.)
Judd Hollow Member (Carmel Fm.)
Kaibab Limestone
Kaiparowitz Formation
Kayenta Formation
Kwagunt Formation
Lamb Point Tongue (Navajo Ss.)
Laney Member (Green River Fm.)
Lewis Shale
Lodore Formation
Lovell Wash Member (Horse Spring Fm.)
Lyndon Limestone
Madison Formation
Manakacha Formation
Mancos Shale
Masok Member (Mancos Shale)
Menefee Formation (Mesaverde Group)
Mesaverde Formation (or Group)
Moenave Formation
Moenkopi Formation
Monitor Butte Member (Chinle Fm.)
Monte Cristo Limestone
Moody Canyon Member (Moenkopi Fm.)
Moqui Member (Moenkopi Fm.)
Morgan Formation
Morrison Formation
Mossback Member (Chile Fm.)
Mount Dutton Formation
Mowry Shale
Muav Limestone
Muddy Creek Formation
Muddy Peak Limestone
Muley Canyon Member (Mancos Shale)
Nankoweap Formation
Navajo Sandstone
Nopah Dolomite
North Horn Formation
Nugget Formation
Organ Rock Formation
Owl Rock Member (Chinle Fm.)
Osiris Tuff
Owiyukuts Complex
Page Sandstone
Pakoon Formation
Paradox Formation
Paria River Member (Carmel Fm.)
Park City Formation
Petrified Forest Member (Chinle Fm.)
Phosphoria Formation
Pictured Cliffs Sandstone
Pinkerton Trail Formation
Pink Hollow Formation
Pioche Shale
Point Lookout Sandstone (Mesaverde)
Precambrian-age rocks of the Colorado Plateau
Quaternary-age rocks of the Colorado Plateau
Queantoweap Sandstone
Rainbow Gardens Member (Horse Spring Fm.)
Red Sandstone
Red Creek Quartzite
Redwall Limestone
Rock Canyon Member (Moenkopi Fm.)
Rock Springs Formation
Rocks of the Grand Wash Trough
Romana Sandstone
Round Valley Limestone
Salt Wash Member (Morrison Fm.)
San Rafael Group
Sego Sandstone (Mesaverde)
Seligman Member (Toroweap Fm.)
Shinarump Conglomerate (Chinle Fm.)
Shinumo Quartzite
Sixtymile Formation
Smoky Hollow Member (Straight Cliffs Fm.)
Springdale Sandstone Member (Moenave Fm.)
Shnabkaib Member (Moenkopi Fm.)
Sinawava Member (Temple Cap Fm.)
Sinbad Limestone Member (Moenkopi Fm.)
Straight Cliffs Formation
Stump Formation
Sultan Limestone
Summerville Formation
Supai Group
Surprise Canyon Formation
Tapeats Sandstone
Temple Butte Formation
Temple Cap Formation
Temple Mountain Member (Chinle Fm.)
Tenney Canyon Member (Kayenta Fm.)
Thumb Member (Horse Spring Fm.)
Tibbet Canyon Member (Straight Cliffs Fm.)
Tiddwell Member (Morrison Fm.)
Timpoweap Member (Moenkopi Fm.)
Tipton Shale Member (Green River Fm.)
Tonto Group
Toroweap Formation
Torrey Member (Moenkopi Fm.)
Tropic Shale
Tunuck Member (Mancos Shale)
Uinta Formation
Uinta Mountain Group
Virgin Limestone Member (Moenkopi Fm.)
Vishnu Basement Rocks
Volcanic rocks of the Colorado Plateau
Wahweap Formation
Wanakah Formation
Wasatch Group
Watahomigi Formation
Weber Sandstone
Wescogame Formation (Supai Group)
White Rim Sandstone
White Throne Member (Temple Cap Fm.)
Whitmore Point Member (Moenave Fm.)
Wilkins Peak Member (Green River Fm.)
Wingate Sandstone
Winsor Member (Carmel Fm.)
Wood Ranch Member (Toroweap Fm.)
Wupatki Member (Moenkopi Fm.)

* show accepted USGS usage. Note that data on this page is modified from information available via the National Geologic Map Database GEOLEX: http://ngmdb.usgs.gov/Geolex/geolex_qs.html.