Hemingford Group
Geology
Formations: Marsland (25), Runningwater (1)
Lithologies: not reported (24), sandstone (2)
Paleoenvironments: terrestrial indet. (24), fluvial indet. (1), "channel" (1)
Age range: base of the Early/Lower Hemingfordian to the top of the Harrisonian or 20.43000 to 18.50000 Ma
Collections
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Harrisonian | USA (Nebraska) | (17735 17736 17737 17738 17739 17741 17744 17789 17791 17809 17842 17858 22641 195408) | |
Harrisonian | USA (Wyoming) | (17785 17788 17793 17817 17820 17824 17833 17835 17838 17840 17850) | |
Early/Lower Hemingfordian | USA (Nebraska) | (17865) |