| Formation | Morrison |
|---|
| Member(s) | Brushy Basin
Brushy Basin/Salt Wash
Indian Fort
Jackpile Sandstone
Lake Como
Recapture
Recapture Creek
Salt Wash
Talking Rocks
Tidwell
Unit B
Westwater |
|---|
| Age: | 151 - 90 Ma
Mesozoic |
|---|
| Interval | Kimmeridgian - Tithonian |
|---|
| Lithology | sandstone, mudstone, "siliciclastic", "shale"/siltstone, sandstone/"shale", "limestone"/claystone, sandstone/mudstone, siltstone/claystone, claystone, sandstone/siltstone, siltstone/"limestone", mudstone/siltstone, mudstone/sandstone, grainstone/siltstone, conglomerate, conglomerate/sandstone, "limestone"/mudstone, siltstone/sandstone, mudstone/claystone, siltstone, sandstone/"limestone", lime mudstone/mudstone |
|---|
| Number of Collections | 126 |
|---|
| Number of Occurrences | 445 |
|---|
| Location | Region | Stratigraphic Name |
|---|
| Mygatt-Moore Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Riggs Quarry 12 | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Riggs Quarry 14 | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Salt Wash |
| Quarry 9 | Albany County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 1 | Albany County, Wyoming, USA | Morrison - Brushy Basin |
| Freeze Out Mtns. Kansas Univ. Expedition | Carbon County, Wyoming, USA | Morrison |
| Lakes Quarry 10 | Jefferson County, Colorado, USA | Morrison - Brushy Basin |
| Carnegie Quarry D | Albany County, Wyoming, USA | Morrison - Lake Como |
| Bone Cabin Quarry | Albany County, Wyoming, USA | Morrison - Lake Como |
| BS Quarry + S Quarry | Fremont County, Wyoming, USA | Morrison |
| RB Quarry | Hot Springs County, Wyoming, USA | Morrison |
| Jim's Place Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Rainbow Park | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Peterson Quarry | Bernalillo County, New Mexico, USA | Morrison - Brushy Basin |
| Dinosaur National Monument Quarry | Uintah County, Utah, USA | Morrison |
| Central Montana 13-16 | Judith Basin County, Montana, USA | Morrison - Brushy Basin/Salt Wash |
| Morrison of Great Falls-Lewistown | Judith Basin County, Montana, USA | Morrison |
| SE Utah/Montezuma Creek | San Juan County, Utah, USA | Morrison - Brushy Basin |
| Brushy Basin Flora/Dinosaur Nat. Mon. | Moffat County, Colorado, USA | Morrison - Brushy Basin |
| Mygatt-Moore Quarry Czekanowskia | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Johnny M Uranian Mine | McKinley County, New Mexico, USA | Morrison - Westwater |
| East Canyon Quarry | San Juan County, Utah, USA | Morrison - Tidwell |
| Felch Quarry 1 | Fremont County, Colorado, USA | Morrison - Brushy Basin |
| Lakes Quarry 5 | Jefferson County, Colorado, USA | Morrison - Brushy Basin |
| Dominguez/Jones Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Suwanee Peak | Cibola County, New Mexico, USA | Morrison |
| Minnekahta tracksite | Fall River County, South Dakota, USA | Morrison |
| Jane Austen tracksite | Albany County, Wyoming, USA | Morrison |
| Riggs Quarry 15 | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Rattlesnake Ridge Quarry | Carbon County, Montana, USA | Morrison |
| NMMNH L-3281 | Union County, New Mexico, USA | Morrison - Brushy Basin |
| NMMNH L-3285 vertebrate site | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| NMMNH L-369 | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Punta de Gallegos | Harding County, New Mexico, USA | Morrison |
| CO-49 | Gunnison County, Colorado, USA | Morrison - Brushy Basin |
| Meilyn Quarry | Carbon County, Wyoming, USA | Morrison |
| Quarry 13 | Albany County, Wyoming, USA | Morrison - Lake Como |
| Quarry 1A | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 1-1/2 | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 2 | Albany County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 3 | Albany County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 4 | Albany County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 5 | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 7 | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 12 | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Main Breakfast Bench Quarry | Albany County, Wyoming, USA | Morrison |
| Chuck's Prospect | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Quarry 9 | Albany County, Wyoming, USA | Morrison - Brushy Basin |
| Dry Mesa Quarry [BYU] | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Howe Quarry | Big Horn County, Wyoming, USA | Morrison - Brushy Basin |
| Howe-Stephens Quarry | Big Horn County, Wyoming, USA | Morrison - Brushy Basin |
| East Camarasaurus Quarry '93 | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| Willow Springs Quarry | Emery County, Utah, USA | Morrison - Brushy Basin |
| Hups Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Cope Quarry I | Fremont County, Colorado, USA | Morrison - Brushy Basin |
| Cope Quarry XII | Fremont County, Colorado, USA | Morrison - Brushy Basin |
| Delfs Quarry | Fremont County, Colorado, USA | Morrison - Salt Wash |
| Cope Quarry XV | Fremont County, Colorado, USA | Morrison - Salt Wash |
| Kessler's Quarry | Fremont County, Colorado, USA | Morrison - Salt Wash |
| Lindsey Quarry | Fremont County, Colorado, USA | Morrison - Brushy Basin |
| Valley of Death 5 | Fremont County, Colorado, USA | Morrison - Brushy Basin |
| Jennings & Johnson locality | Fremont County, Colorado, USA | Morrison - Brushy Basin |
| Alcova Quarry | Natrona County, Wyoming, USA | Morrison |
| Red Fork | Johnson County, Wyoming, USA | Morrison |
| Carnegie Quarry N | Albany County, Wyoming, USA | Morrison |
| OMNH Quarry 1 | Cimarron County, Oklahoma, USA | Morrison - Brushy Basin |
| Brush Creek | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Stovall's Pit 5 | Cimarron County, Oklahoma, USA | Morrison |
| Hinkle Site | Grand County, Utah, USA | Morrison - Brushy Basin |
| Cabin Creek Quarry | Gunnison County, Colorado, USA | Morrison - Salt Wash |
| Potter Creek Quarry | Montrose County, Colorado, USA | Morrison - Brushy Basin |
| Upper Strickland Creek Quarry | Park County, Montana, USA | Morrison |
| Bear Butte Quarry | Meade County, South Dakota, USA | Morrison - Brushy Basin |
| Green River Dinosaur Quarry | Emery County, Utah, USA | Morrison - Brushy Basin |
| Fuller's 351 | Lawrence County, South Dakota, USA | Morrison - Brushy Basin |
| Wonderland Quarry | Meade County, South Dakota, USA | Morrison |
| Parker's Mystery Locality | Fall River County, South Dakota, USA | Morrison |
| Inyan Kara Creek | Crook County, Wyoming, USA | Morrison |
| SDSM V9139 | Crook County, Wyoming, USA | Morrison |
| Eriksen Ceratosaurus | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Cleveland-Lloyd Dinosaur Quarry | Emery County, Utah, USA | Morrison - Brushy Basin |
| YPM 64-23 | Big Horn County, Montana, USA | Morrison |
| NMMNH locality L-210 | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| NMMNH locality L-344 | Sandoval County, New Mexico, USA | Morrison - Jackpile Sandstone |
| DNM 315 | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Carnegie Quarry C | Albany County, Wyoming, USA | Morrison - Lake Como |
| Middle Park | Grand County, Colorado, USA | Morrison |
| Purgatoire River tracksite | Las Animas County, Colorado, USA | Morrison - Unit B |
| Higbee tracksite | Otero County, Colorado, USA | Morrison |
| Young locality | Delta County, Colorado, USA | Morrison - Salt Wash |
| DNM 375 | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Main Callison Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Uravan Locality | Paradox Valley, Uravan Mining District, Montrose County, Colorado, USA | Morrison - Brushy Basin |
| Kirkland Egg site | Mesa County, Colorado, USA | Morrison - Salt Wash |
| Dinosaur Ridge I-70 section | Jefferson County, Colorado, USA | Morrison |
| Lower Slide Lake | Teton County, Wyoming, USA | Morrison |
| Ninemile Quarry | Carbon County, Wyoming, USA | Morrison |
| Kings View Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Red Mountain | Carbon County, Wyoming, USA | Morrison |
| Fox Mesa | Big Horn County, Wyoming, USA | Morrison |
| Buffalo Quarry | Johnson County, Wyoming, USA | Morrison |
| Nielsen Gulch | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Lynn Quarry | Carbon County, Wyoming, USA | Morrison - Brushy Basin |
| AMNH Stego 99 Quarry | Carbon County, Wyoming, USA | Morrison |
| Bernice Quarry | Albany County, Wyoming, USA | Morrison - Indian Fort |
| Mile 175 | Crook County, Wyoming, USA | Morrison |
| Boundary Butte tracksite | San Juan County, Utah, USA | Morrison - Salt Wash |
| Bollan Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Riggs Quarry 13 | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Holt Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Freezeout Hills Quarry 4 | Carbon County, Wyoming, USA | Morrison |
| Carnegie Quarry F | Albany County, Wyoming, USA | Morrison - Talking Rocks |
| Carnegie Quarry J | Albany County, Wyoming, USA | Morrison |
| Hatch Ranch | Meade County, South Dakota, USA | Morrison |
| Acoma Site | Cibola County, New Mexico, USA | Morrison |
| Rainbow Park microsite | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Bobcat Pit | Weston County, Wyoming, USA | Morrison |
| Paint Creek | Park County, Wyoming, USA | Morrison |
| Poison Creek Quarry | Johnson County, Wyoming, USA | Morrison |
| Blacktail Creek | Crook County, Wyoming, USA | Morrison |
| Dyer Ranch Quarry 1 | Carbon County, Wyoming, USA | Morrison |
| Hanksville-Burpee Quarry | Henry Mountains, Garfield County, Utah, USA | Morrison - Brushy Basin |
| Utah Field House Quarry | Uintah County, Utah, USA | Morrison |
| Mill Canyon Quarry | Grand County, Utah, USA | Morrison - Brushy Basin |
| Floy Junction | Grand County, Utah, USA | Morrison |
| Cisco sauropod site | Grand County, Utah, USA | Morrison |
| Emery County sauropod site | Emery County, Utah, USA | Morrison - Brushy Basin |
| Tom's Place Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Garden Park baby ornithopod | Fremont County, Colorado, USA | Morrison |
| Hidden Canyon Overlook tracksite | Grand County, Utah, USA | Morrison - Salt Wash |
| Lost Springs tracksite | Henry Mountains, Garfield County, Utah, USA | Morrison - Salt Wash |
| Red Canyon Ranch | Big Horn County, Wyoming, USA | Morrison |
| Shell | Big Horn County, Wyoming, USA | Morrison |
| Sand Bench | Emery County, Utah, USA | Morrison - Brushy Basin |
| Something Interesting Quarry | Hot Springs County, Wyoming, USA | Morrison |
| Fruitafossor windscheffeli site | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Sinbad Valley | Mesa County, Colorado, USA | Morrison |
| NMMNH L-555 | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Mother's Day Quarry | Carbon County, Montana, USA | Morrison - Salt Wash |
| Piñon Locality | Navajo County, Arizona, USA | Morrison |
| Wilson Creek | Fremont County, Colorado, USA | Morrison |
| Radium Locality | Grand County, Colorado, USA | Morrison |
| Blue Mesa Quarry | Gunnison County, Colorado, USA | Morrison |
| Masonville locality | Larimer County, Colorado, USA | Morrison |
| Villegreen | Las Animas County, Colorado, USA | Morrison |
| FPA General Site | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Aurora Quarry 3 | Carbon County, Wyoming, USA | Morrison |
| Alcova Lake | Natrona County, Wyoming, USA | Morrison |
| Jimbo Quarry | Converse County, Wyoming, USA | Morrison |
| Zane Quarry | Albany County, Wyoming, USA | Morrison - Lake Como |
| Section 19 Mine | McKinley County, New Mexico, USA | Morrison - Salt Wash |
| Alcova Lake tracks | Natrona County, Wyoming, USA | Morrison - Lake Como |
| George's "Coelurosaur" Site | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Coyote Basin tracksites | Big Horn County, Wyoming, USA | Morrison |
| Sah Tah Wash tracksite | Apache County, Arizona, USA | Morrison - Salt Wash |
| tracksite 2.4 km west of Kenton | Cimarron County, Oklahoma, USA | Morrison |
| Furnish Canyon pterosaur tracksite | Baca County, Colorado, USA | Morrison |
| Jensen/Jensen Quarry | Uintah County, Utah, USA | Morrison - Brushy Basin |
| Recapture | San Juan County, Utah, USA | Morrison - Recapture Creek |
| Little Cottonwood Creek | Washakie County, Wyoming, USA | Morrison |
| DMNH 3149 | Fremont County, Colorado, USA | Morrison |
| La Sal Mountains | San Juan County, Utah, USA | Morrison - Brushy Basin |
| north end | Mesa County, Colorado, USA | Morrison - Salt Wash |
| Lance Creek area | Niobrara County, Wyoming, USA | Morrison |
| McConnell I | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| McConnell II | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Martini I | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Cary I | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Seismosaurus Quarry III | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Seismosaurus Quarry II | Sandoval County, New Mexico, USA | Morrison - Brushy Basin |
| Ute Canyon tracksite | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Salt Wash |
| Dana Quarry | Washakie County, Wyoming, USA | Morrison |
| Glirodon grandis type site | Uintah County, Utah, USA | Morrison - Brushy Basin |
| DMNH Loc. 1505 | Fremont County, Colorado, USA | Morrison |
| Calico Gulch Dinosaur Quarry | Moffat County, Colorado, USA | Morrison |
| 4.8 km WSW of Fruita | Mesa County, Colorado, USA | Morrison - Salt Wash |
| near Brown's Ranch | Johnson County, Wyoming, USA | Morrison |
| Carnegie Quarry A | Albany County, Wyoming, USA | Morrison - Talking Rocks |
| tracksite | Grand County, Utah, USA | Morrison - Salt Wash |
| Copper Ridge Dinosaur Tracksite | Grand County, Utah, USA | Morrison - Salt Wash |
| Rancho del Rio tracksite | Eagle County, Colorado, USA | Morrison - Salt Wash |
| Gordon-Bramson-Brothers Quarry | Pitkin County, Colorado, USA | Morrison |
| McElmo Canyon | Mesa Verde National Park, Montezuma County, Colorado, USA | Morrison - Brushy Basin |
| Section 16 Open Space | El Paso County, Colorado, USA | Morrison |
| Eriksen Stegosaur | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Taildust Theropod Quarry | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Bull Canyon | Guadalupe County, New Mexico, USA | Morrison |
| Bull Canyon | Guadalupe County, New Mexico, USA | Morrison |
| 5 km west of Exter | Socorro County, New Mexico, USA | Morrison |
| 16 miles northwest of Tucumcari | San Miguel County, New Mexico, USA | Morrison |
| Ute Creek area | Harding County, New Mexico, USA | Morrison |
| Little Wagonhound Creek | Carbon County, Wyoming, USA | Morrison |
| Sheep Mountain anticline | Big Horn County, Wyoming, USA | Morrison |
| Cisco Mammal Quarry | Grand County, Utah, USA | Morrison - Brushy Basin |
| Montezuma Canyon | San Juan County, Utah, USA | Morrison - Brushy Basin |
| White Mesa | San Juan County, Utah, USA | Morrison - Brushy Basin |
| Upper Pond | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Callison Quarry #1 | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| Parking Lot | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| NMMNH Loc. 363 | Quay County, New Mexico, USA | Morrison - Brushy Basin |
| Warm Springs Ranch tracksite | Hot Springs County, Wyoming, USA | Morrison |
| Tsetah WIndmill tracksite | Apache County, Arizona, USA | Morrison - Salt Wash |
| Garden Park Visitor Center tracksite | Fremont County, Colorado, USA | Morrison |
| Garden Park north tracksite | Fremont County, Colorado, USA | Morrison |
| East Dalton Wells tracksite | Grand County, Utah, USA | Morrison - Brushy Basin |
| East Creek tracksite | Mesa County, Colorado, USA | Morrison |
| Frost locality tracksite | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Salt Wash |
| Pollock Canyon tracksite | Mesa County, Colorado, USA | Morrison - Salt Wash |
| Fort Collins tracksite | Larimer County, Colorado, USA | Morrison |
| Gray Daun Mine tracksite | San Juan County, Utah, USA | Morrison - Salt Wash |
| Copper Canyon tracksite | Henry Mountains, Garfield County, Utah, USA | Morrison - Salt Wash |
| West Rabbit Ridge tracksite | Grand County, Utah, USA | Morrison - Salt Wash |
| tracksite north of Boise City | Cimarron County, Oklahoma, USA | Morrison |
| Black Ridge Trail I tracksite | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Salt Wash |
| Black Ridge Trail II tracksite | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Salt Wash |
| Black DInah Mine tracksite | Montrose County, Colorado, USA | Morrison - Salt Wash |
| Grand Junction tracksite | Mesa County, Colorado, USA | Morrison |
| West Monument Mesa tracksite | Colorado National Monument, Fruita, Mesa County, Colorado, USA | Morrison - Salt Wash |
| Split Rock Waterfall tracksite | Mesa County, Colorado, USA | Morrison - Brushy Basin |
| CLDQ southwest tracksite | Emery County, Utah, USA | Morrison - Brushy Basin |
| CLDQ Visitors Center tracksite | Emery County, Utah, USA | Morrison - Brushy Basin |
| San Rafael River tracksite | Emery County, Utah, USA | Morrison - Brushy Basin |
| East Canyon I tracksite | San Juan County, Utah, USA | Morrison - Salt Wash |
| La Sal Loop Road tracksite | San Juan County, Utah, USA | Morrison - Salt Wash |
| Cedar Ridge tracksite | Fremont County, Wyoming, USA | Morrison |
| DNM Allosaurus Quarry | Uintah County, Utah, USA | Morrison - Salt Wash |
| Stratigraphic Name | Age | Lithology | Occurrence Records |
|---|
| Cloverly | 113 - 101 Ma
Early/Lower Cretaceous | | 25 |
| Cloverly - Himes | 113 - 101 Ma
Early/Lower Cretaceous | sandstone, claystone, mudstone, mudstone/claystone | 217 |
| Lance | 72.1 - 66.0 Ma
Late/Upper Cretaceous | mudstone/sandstone | 1 |
| Menefee - Cleary Coal | 85.8 - 70.6 Ma
Late/Upper Cretaceous | | 20 |
| Morrison - Brushy Basin | 151 - 145 Ma
Late Jurassic | mudstone/conglomerate, claystone/sandstone, mudstone/sandstone, claystone, sandstone/mudstone, mudstone, "siliciclastic", sandstone/claystone, sandstone, siltstone, siltstone/ash, mudstone/lime mudstone, siltstone/sandstone, conglomerate, "limestone", conglomerate/"shale", sandstone/siltstone, claystone/"limestone", "limestone"/mudstone | 886 |
| Morrison - Brushy Basin/Salt Wash | 164 - 145 Ma
Jurassic | | 21 |
| Morrison - Indian Fort | 152 - 145 Ma
Late Jurassic | sandstone/mudstone, mudstone | 7 |
| Morrison - Jackpile Sandstone | 157 - 145 Ma
Jurassic | sandstone | 2 |
| Morrison - Lake Como | 157 - 145 Ma
Jurassic | marl/"limestone", sandstone, mudstone, sandstone/claystone, "limestone", "shale"/sandstone | 81 |
| Morrison - Recapture | 157 - 145 Ma
Jurassic | | 1 |
| Morrison - Recapture Creek | 157 - 145 Ma
Jurassic | | 1 |
| Morrison - Salt Wash | 156 - 145 Ma
Jurassic | claystone/"shale", sandstone/mudstone, mudstone/sandstone, mudstone, sandstone, sandstone/siltstone, siltstone, sandstone/claystone, conglomerate/sandstone | 95 |
| Morrison - Talking Rocks | 157 - 145 Ma
Jurassic | claystone, mudstone | 17 |
| Morrison - Tidwell | 161 - 156 Ma
Jurassic | sandstone | 1 |
| Morrison - Unit B | 157 - 145 Ma
Jurassic | lime mudstone | 26 |
| Morrison - Westwater | 164 - 145 Ma
Jurassic | mudstone | 1 |
| Summerville | 164 - 152 Ma
Jurassic | sandstone, "siliciclastic" | 15 |
| Summerville/Bluff Sandstone | 164 - 152 Ma
Jurassic | sandstone | 7 |
| Sundance | 164 - 157 Ma
Jurassic | limestone | 9 |
| Sundance - Windy Hill Sandstone | 164 - 157 Ma
Jurassic | sandstone, "limestone" | 5 |
| Chinle - Sloan Canyon | 228 - 209 Ma
Late/Upper Triassic | sandstone/siltstone, siltstone, conglomerate, sandstone/claystone | 32 |
| Glen Canyon - Wingate Sandstone | 201 - 199 Ma
Early Jurassic | mudstone, sandstone, sandstone/conglomerate, "siliciclastic" | 45 |
| Montana - Pierre Shale - Sharon Springs | 83.5 - 70.6 Ma
Late/Upper Cretaceous | shale, "shale"/"limestone", "limestone" | 49 |
| San Rafael - Entrada Sandstone | 164 - 151 Ma
Jurassic | sandstone | 5 |