Sespe Formation

Geology

Members: unnamed (72), Bed CS1 (1), Bed CS4 (1), Bed CS5 (1), Bed SS16 (1), Leptauchenid Zone (3), Lower (2), Middle (9)

Lithologies: not reported (30), claystone (2), mudstone (14), "shale" (1), siltstone (1), sandstone (51), conglomerate (1)

Paleoenvironments: terrestrial indet. (55), coastal indet. (14), fluvial indet. (1), fluvial-lacustrine indet. (20)

Age range: base of the Uintan to the top of the Harrisonian or 46.20000 to 18.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Eocene56.0 - 33.9USA (California) (16816)
Late/Upper Uintan46.2 - 39.7USA (California) (16815 16817 167831)
Uintan46.2 - 39.7USA (California) (16783 16784 16785 16786 16787 16788 16789 16790 16791 16792 16793 16794 16795 16796 16797 16798 16799 16814)
Uintan - Duchesnean46.2 - 37.0USA (California) (16800 16801 16802)
Duchesnean39.7 - 37.0USA (California) (16782 16803 16804 16805 16806 16807 16808 16809 16810 16811 16812 16813 16818)
Whitneyan - late Early Arikareean33.3 - 18.5USA (California) (17527)
Arikareean29.5 - 18.5USA (California) (17670 17671 17672 17673 17674 17675 17676 17677 17678 17679 17680 17681 17682 17683 17684 17685)
early Early Arikareean29.5 - 18.5USA (California) (167846 167847)
early Early Arikareean - early Late Arikareean29.5 - 18.5USA (California) (175251)
late Late Arikareean29.5 - 18.5USA (California) (160461 167825 167826 167827 167828 167829 167832 167848 167849 167850 167851 167852 167853 167854 167855 167856)
Harrisonian24.8 - 18.5USA (California) (17742)
Early/Lower Miocene23.03 - 15.97USA (California) (94850 94851 94852 94853 94854 94856 94857 94859 94861 94862 94864 94865 94866 94868)
Early/Lower Hemingfordian20.43 - 15.97USA (California) (167830)