Dockum Formation, Group
Geology
Formations: unnamed (5), Bull Canyon (8), Camp Springs (1), Colorado City (10), Cooper Canyon (12), Santa Rosa Sandstone (1), Tecovas (17), Trujillo (2)
Members: unnamed (1), Iatan (1)
Lithologies: not reported (14), "siliciclastic" (3), claystone (8), mudstone (13), siltstone (8), sandstone (16), conglomerate (4)
Paleoenvironments: terrestrial indet. (37), delta plain (1), fluvial indet. (4), alluvial fan (1), channel lag (1), fine channel fill (2), "channel" (2), "floodplain" (1), crevasse splay (7), fluvial-lacustrine indet. (1), lacustrine - small (1)
Age range: Lacian or 221.50000 to 215.56000 Ma
Collections
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Carnian - Norian | USA (Texas) | (12942 22666 22704 22706 22707 71976 71977 71978 71979 71980 71982 71983 84270 85485 92093 93600 94492 98596 98605 98606 105766 105769 135653 135656 135657 135662 135695 135713 207500) | |
Late/Upper Triassic | USA (Texas) | (39671 164520 164521) | |
Late/Upper Triassic | USA (New Mexico) | (71981) | |
Norian | USA (Texas) | (13273 48424 67699 79947 84269 94493 194471 196354 196537 196651 218126 218143 218144 218145 218146 218147 218149) | |
Norian | USA (New Mexico) | (48516 49499 52495 57071 188759) | |
Lacian | USA (New Mexico) | (52497 83958) | |
Lacian - Alaunian | USA (New Mexico) | (92090) |