ammonites

Brushy Basin Member

Geology

Formation: Morrison

Lithologies: not reported (10), claystone (20), mudstone (36), siltstone (7), sandstone (36), conglomerate (1), marl (1), lime mudstone (1), "limestone" (4), ash (2), tuff (1)

Paleoenvironments: terrestrial indet. (40), fluvial indet. (1), channel lag (1), coarse channel fill (2), "channel" (23), wet floodplain (23), dry floodplain (9), crevasse splay (5), levee (2), fluvial-lacustrine indet. (6), pond (11)

Age range: Late Kimmeridgian to Middle Tithonian or 155.7 to 145.5 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Jurassic199.6 - 145.5USA (Utah) (96826)
Late Jurassic161.2 - 145.5USA (Colorado) (24801)
Late Jurassic161.2 - 145.5USA (Montana) (24668)
Late Jurassic161.2 - 145.5USA (Utah) (13275 24797 24799 24800)
Kimmeridgian - Tithonian155.7 - 145.5USA (Colorado) (11611 11924 13341 22708 28366 28382 36576 39375 39376 39377 39419 39421 48124 48127 48128 48130 48146 48147 48148 48149 48150 48151 48152 48153 48154 48157 48161 48162 48163 48164 48165 48166 48167 48168 49622 49623 49652 56586 56596 56599 56683 56684 58811 66909)
Kimmeridgian - Tithonian155.7 - 145.5USA (New Mexico) (38867 22717 38872 51990 51992)
Kimmeridgian - Tithonian155.7 - 145.5USA (Utah) (22711 47196 49595 49614 49626 53035 55350 58551)
Kimmeridgian - Tithonian155.7 - 145.5USA (Wyoming) (12816 13212 22648 49627 39253 39337 39338 39339 39340 39342 39344 39345 39346 39347 39368 39369 39370 39371 39373 39374 39426 39427 39428 39430 39431 49628)
Late Kimmeridgian - Tithonian155.7 - 145.5USA (Colorado) (45975 55329 70031 70032)
Late Kimmeridgian - Tithonian155.7 - 145.5USA (New Mexico) (68099)
Late Kimmeridgian - Tithonian155.7 - 145.5USA (Oklahoma) (49338 49598)
Kimmeridgian155.7 - 150.8USA (Colorado) (68024 35293 38883 53041 56590)
Kimmeridgian155.7 - 150.8USA (New Mexico) (38871)
Kimmeridgian155.7 - 150.8USA (Utah) (46436 46437 46438 46439 46440 57913 64053)
Kimmeridgian155.7 - 150.8USA (Wyoming) (46460 46462 46465 46468 46469 47065)
Tithonian150.8 - 145.5USA (Colorado) (48129)
Tithonian150.8 - 145.5USA (South Dakota) (49625 49630)
Tithonian150.8 - 145.5USA (Wyoming) (39429 49629)
Early Tithonian150.8 - 145.5USA (Colorado) (53040)
Early Tithonian150.8 - 145.5USA (Wyoming) (55482 56654)
Middle Tithonian150.8 - 145.5USA (Utah) (52110)