Morrison Formation

Geology

Members: unnamed (178), Boise (2), Brushy Basin (142), Cimarron (2), Indian Fort (16), Jackpile Sandstone (1), Kenton (10), Lake Como (31), Recapture (2), Salt Wash (43), Talking Rocks (12), Tidwell (5), Unit B (6), Westwater Canyon (2)

Lithologies: not reported (125), "siliciclastic" (4), claystone (41), mudstone (124), "shale" (6), siltstone (26), sandstone (166), gravel (1), conglomerate (10), marl (1), lime mudstone (9), wackestone (1), grainstone (1), "limestone" (13), ash (2)

Paleoenvironments: terrestrial indet. (189), carbonate indet. (1), coastal indet. (5), delta plain (2), deltaic indet. (2), fluvial indet. (11), alluvial fan (2), channel lag (3), coarse channel fill (18), fine channel fill (4), "channel" (51), wet floodplain (48), dry floodplain (15), "floodplain" (7), crevasse splay (33), levee (4), mire/swamp (2), fluvial-lacustrine indet. (11), lacustrine - large (1), lacustrine - small (2), pond (21), lacustrine delta front (1), lacustrine indet. (19)

Age range: base of the Late/Upper Oxfordian to the top of the Middle Tithonian or 161.20000 to 145.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Callovian - Oxfordian164.7 - 157.3USA (Utah) (60478)
Oxfordian - Kimmeridgian163.5 - 152.1USA (Colorado) (105537 225134)
Late/Upper Jurassic161.5 - 145.0USA (Colorado) (136080)
Late/Upper Jurassic161.5 - 145.0USA (Wyoming) (62561)
Late/Upper Oxfordian161.2 - 155.7USA (Utah) (28360 222904)
Late/Upper Oxfordian - Kimmeridgian161.2 - 152.1USA (New Mexico) (84308)
Late/Upper Oxfordian - Kimmeridgian161.2 - 152.1USA (Utah) (156127)
Late/Upper Oxfordian - Early/Lower Kimmeridgian161.2 - 150.8USA (Wyoming) (126540)
Late/Upper Oxfordian - Tithonian161.2 - 145.0USA (Colorado) (227703)
Kimmeridgian157.3 - 152.1USA (Wyoming) (192747 36270 38884 46460 46462 46465 46468 46469 55349 57903 58510 75453 176983 176984 176985 185607 196439)
Kimmeridgian157.3 - 152.1USA (New Mexico) (38871 225130)
Kimmeridgian157.3 - 152.1USA (Montana) (49624 69890 192717)
Kimmeridgian157.3 - 152.1USA (Colorado) (11925 13277 68024 35293 48170 48171 48855 49621 52259 56590 59375 102476 123526 154924 156134 164787 192756 192757 192777 192782)
Kimmeridgian157.3 - 152.1USA (Oklahoma) (92285)
Kimmeridgian157.3 - 152.1USA (Utah) (56321 58515 61676 62207 64053 137198 137199 156133 192732 192750 192785 192788 192789 192790 193250 225925 231534 231583)
Kimmeridgian - Tithonian157.3 - 145.0USA (Montana) (24668 24670 50714 215054 231532)
Kimmeridgian - Tithonian157.3 - 145.0USA (Colorado) (11611 11924 13341 24801 25141 28005 36576 39376 39377 39419 39421 48127 48128 48130 48146 48147 48148 48149 48150 48151 48152 48153 48157 48158 48164 48165 48169 49622 49623 49652 192729 52872 52917 52919 52920 52921 52923 55195 56586 56596 56599 56683 56684 61890 66909 66910 66911 66912 66913 66914 68097 70026 70027 70028 70029 70030 137733 137746 177496 177497 179212 184626 184627 192447 192448 192450 192451 192452 192453 192455 192456 192457 192714 192715 192716 192781 231533 231591 231594 231615 231617 231618)
Kimmeridgian - Tithonian157.3 - 145.0USA (Utah) (13275 24797 24799 24800 47196 49595 49614 49626 53035 55350 58514 58516 58517 58518 58551 96826 96840 104715 131064 192428 194149 220417 221973 229869 229984)
Kimmeridgian - Tithonian157.3 - 145.0USA (Texas) (231290)
Kimmeridgian - Tithonian157.3 - 145.0USA (Arizona) (70024 94678 94773 94774)
Kimmeridgian - Tithonian157.3 - 145.0USA (South Dakota) (36268 49631 49633 57904 57905)
Kimmeridgian - Tithonian157.3 - 145.0USA (New Mexico) (38867 22717 24802 36265 38872 38873 51990 51991 51992 57910 119021 119022 119023 119024 119025 119026 119027 119090 188393 188394 188395 188396 192449 225131 225132 225172 225200 225203 225204 225206 225207 225208 225209 225332)
Kimmeridgian - Tithonian157.3 - 145.0USA (Oklahoma) (89979 192753 231016 231017 231018 231019 231020)
Kimmeridgian - Tithonian157.3 - 145.0USA (Wyoming) (12816 13212 13214 13352 22648 49627 57893 39253 39337 39338 39339 39340 39342 39344 39368 39369 39370 39371 39372 39373 39374 39428 39430 39431 48557 48565 48837 49628 49634 49636 49637 52815 52816 55206 55320 55323 55330 55333 55483 55484 55486 55487 56165 57900 57895 57894 57899 57897 57898 57896 57901 57902 58507 58508 58509 58511 58512 58513 62576 67537 67538 68100 73998 74000 74664 74665 92105 93138 100228 106532 142334 142335 142336 142337 156135 168056 188398 190894 192707 192708 192710 192711 192728 192746 192748 192749 192791 207747 207748 207749 210654 221673 224376 224377 224378 224379 224380 225937 225938 226819 227262 227263 230769 230770 230771 230772 230773 230774 231545 231546 231547 231548 231549 231550 231551 231552 231553 231563 231564 231565 231566 231567 231568 231569 231570 231571 231572 231573 231574 231575 231576 231577 231578 231579)
Kimmeridgian - Turonian157.3 - 89.8USA (New Mexico) (188397)
Early/Lower Kimmeridgian155.7 - 150.8USA (Arizona) (192713)
Early/Lower Kimmeridgian155.7 - 150.8USA (Colorado) (48156)
Late/Upper Kimmeridgian155.7 - 150.8USA (Montana) (38866)
Late/Upper Kimmeridgian155.7 - 150.8USA (Wyoming) (22650)
Late/Upper Kimmeridgian - Early/Lower Tithonian155.7 - 145.0USA (Wyoming) (47065 49577)
Late/Upper Kimmeridgian - Early/Lower Tithonian155.7 - 145.0USA (Utah) (192432 192731)
Late/Upper Kimmeridgian - Early/Lower Tithonian155.7 - 145.0USA (Colorado) (28366 28382 39375 45975 48155 48160 48172 53021 53022)
Late/Upper Kimmeridgian - Tithonian155.7 - 145.0USA (Colorado) (38883 70031 70032 192783 207744 231620 231621)
Late/Upper Kimmeridgian - Tithonian155.7 - 145.0USA (Oklahoma) (49338 49596 49597 56421 56422)
Late/Upper Kimmeridgian - Tithonian155.7 - 145.0USA (Wyoming) (22678 74663)
Late/Upper Kimmeridgian - Tithonian155.7 - 145.0USA (Utah) (192786 192787)
Late/Upper Kimmeridgian - Tithonian155.7 - 145.0USA (New Mexico) (68099 216963)
Tithonian152.1 - 145.0USA (Wyoming) (39345 39346 39347 39412 39426 39427 39429 49629 55482 177492)
Tithonian152.1 - 145.0USA (Oklahoma) (49598)
Tithonian152.1 - 145.0USA (South Dakota) (49625 49630 132242 132243)
Tithonian152.1 - 145.0USA (Utah) (22711 46439 57913 225118 231582)
Tithonian152.1 - 145.0USA (Colorado) (22708 48124 48129 48161 48162 48163 48166 48168 53040 53041 55329 58811 154925 164830 177145 231619)
Early/Lower Tithonian150.8 - 145.0USA (Colorado) (48154 48167 71476 92360 192454)
Early/Lower Tithonian150.8 - 145.0USA (Utah) (21852 191718 222544 231581)
Early/Lower Tithonian150.8 - 145.0USA (Wyoming) (56654)
Middle Tithonian150.8 - 145.0USA (Utah) (52110)