Florissant Formation

Geology

Members: unnamed (68), Middle Shale (2)

Lithologies: not reported (2), mudstone (2), "shale" (65), siltstone (4), conglomerate (1), "volcaniclastic" (2)

Paleoenvironments: fluvial indet. (1), "channel" (1), lacustrine - large (64), lacustrine indet. (4)

Age range: Late/Upper Chadronian or 37.20000 to 33.90000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Chadronian37.2 - 33.9USA (Colorado) (16968 34966 106379 106380 106381 106382 106383 106384 106385 106453 123119 113749 114150 140496 123981 119496 121307 121481 122163 122628 122629 122741 122742 122975 122976 122977 122978 122979 122980 122981 124001 124002 127219 124527 124624 124680 124681 124682 124683 124692 151411 125145 127264 127617 129630 132362 132748 140083 144404 144630 144782 151374 151544 151548 151866 152074 152139 162204 164173 169462 227993)
Late/Upper Chadronian37.2 - 33.9USA (Colorado) (84799 85117)
Late/Upper Eocene37.2 - 33.9USA (Colorado) (112320 122093 140149)
Late/Upper Eocene - Early/Lower Oligocene37.2 - 28.4USA (Colorado) (39837 39839 39849 39851)