Judith River Formation, Group
Geology
Group: Montana
Formations: Dinosaur Park (1)
Members: unnamed (81), Foremost (5), Ribstone Creek (1), upper (2)
Lithologies: not reported (32), "siliciclastic" (7), claystone (3), mudstone (6), "shale" (1), siltstone (2), sandstone (19), coal (1), lignite (1)
Paleoenvironments: terrestrial indet. (60), marginal marine indet. (1), coastal indet. (1), estuary/bay (2), deltaic indet. (5), transition zone/lower shoreface (5), channel lag (3), fine channel fill (1), "channel" (2), crevasse splay (2), levee (1), mire/swamp (1), fluvial-deltaic indet. (1), lacustrine indet. (4)
Age range: Campanian or 83.500 to 70.600 Ma
Collections
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Campanian | USA (South Dakota) | (142509) | |
| Campanian | Canada (Saskatchewan) | (75030) | |
| Campanian | Canada (Alberta) | (48834 48835 71485 71486 99816) | |
| Campanian | USA (Montana) | (32404 34016 46121 46122 46123 46124 48620 49001 50825 50826 50827 50828 50829 50830 50906 50907 50909 51682 51683 58156 60518 61452 64643 64788 69150 69153 69161 69177 69178 69213 69250 69251 69252 69253 69450 73891 122333 128455 128560 140916 142328 142495 142506 142510 142511 142512) | |
| Judithian | Canada (Saskatchewan) | (14493 14494) | |
| Judithian | USA (Montana) | (14432 14434 14435 14445 14446 14447 14448 14449 14450 14452 14457 14459 14460 14461 14462 14468 14470 14482 14483 14490 14491 14492 23549 23551) | |
| Late/Upper Campanian | Canada (Alberta) | (82680 82681 82683 82684 82686 87440) | |
| Late/Upper Campanian | USA (Montana) | (14437 26779 69624) | |
| Middle Campanian | USA (Montana) | (69152 69281) |