Calvert Formation

Geology

Group: Chesapeake

Members: unnamed (23), Calvert Beach (39), Fairhaven (14), Plum Point (67)

Lithologies: not reported (28), "siliciclastic" (5), claystone (64), siltstone (4), sandstone (35), conglomerate (1), marl (7)

Paleoenvironments: marine indet. (37), terrestrial indet. (2), offshore shelf (1), marginal marine indet. (5), coastal indet. (45), estuary/bay (34), foreshore (13), transition zone/lower shoreface (1), offshore (6)

Age range: base of the Aquitanian to the top of the Serravallian or 23.03000 to 11.62000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Aquitanian23.03 - 20.44USA (Maryland) (70589 71794 71814)
Aquitanian23.03 - 20.44USA (Virginia) (70517)
Aquitanian - Serravallian23.03 - 11.62USA (Maryland) (231816)
Miocene23.03 - 5.333USA (Maryland) (18517 231834 231835)
Burdigalian20.44 - 15.97USA (Maryland) (17790 45493 45511 57786 57960 60848 70590 70591 70592 70593 70815 70816 70817 71796 71807 71810 71924 79101 79102)
Burdigalian20.44 - 15.97USA (Virginia) (57951 57953 57959 85360 89448 89454 89549)
Burdigalian20.44 - 15.97USA (Delaware) (18579)
Burdigalian - Langhian20.44 - 13.82USA (Maryland) (18518 51718 68977 231819 231820)
Burdigalian - Serravallian20.44 - 11.62USA (Maryland) (45510 60858 60870 68976 123869 125137 144136)
Burdigalian - Serravallian20.44 - 11.62USA (Virginia) (105548)
Langhian15.97 - 13.82USA (Virginia) (28368 48883 57784 57785 57787 66065 70516 71654 71797 71799 71804 71808 71813 79793 207008 231782)
Langhian15.97 - 13.82USA (Maryland) (60379 18516 100214 100213 100212 45498 45502 45506 70826 45509 48884 51724 55517 68975 69023 69024 70818 70819 70820 70823 70824 70827 70834 71615 71634 71647 71795 71805 71809 89550 98328 126602 168458)
Langhian - Serravallian15.97 - 11.62USA (Maryland) (97474 231780)
Serravallian13.82 - 11.62USA (Virginia) (45508 55690 57110 57111 57113 57114 57700 71627 71629 71642 71645 71806 71798 71800 71801 71811 71812 97416 187324 201605)
Serravallian13.82 - 11.62USA (Maryland) (18580 37347 49945 51716 55396 57782 70594 70821 70822 70825 70828 70829 70835 70836 70837 70842 71533 71641 71648 88577 88578 88580 88581 155893 231783)