Hawthorne Group

Geology

Formations: Marks Head (5), Parachucla (1)

Lithologies: not reported (2), claystone (1), sandstone (1), dolomite (2), phosphorite (1)

Paleoenvironments: marine indet. (3), terrestrial indet. (1), marginal marine indet. (1), coastal indet. (1)

Age range: base of the Chattian to the top of the Hemingfordian or 27.30000 to 16.30000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Chattian27.3 - 23.04USA (Florida) (13076)
Burdigalian20.45 - 15.98USA (Florida) (35024)
Burdigalian20.45 - 15.98USA (South Carolina) (212231)
Burdigalian20.45 - 15.98USA (Georgia) (55530)
Hemingfordian18.5 - 16.3USA (Florida) (176936)
Late/Upper Hemingfordian18.5 - 16.3USA (Florida) (18512)