Kirkwood Formation

Geology

Group: Uitenhage

Members: unnamed (48), Alloway Clay (1), Asbury Park (1), lower (2), Shiloh marl (39), Uppermost (1)

Lithologies: not reported (8), claystone (9), mudstone (23), "shale" (1), siltstone (16), sandstone (59), marl (1)

Paleoenvironments: marine indet. (3), terrestrial indet. (18), marginal marine indet. (1), coastal indet. (61), fluvial indet. (5), "channel" (1), "floodplain" (1), lacustrine indet. (2)

Age range: base of the Asbian to the top of the Early/Lower Hemingfordian or 339.90000 to 16.30000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Asbian339.9 - 335.9United Kingdom (Scotland) (93302 93304)
Tithonian - Valanginian149.2 - 132.6South Africa (Eastern Cape) (62550 88876)
Berriasian - Early/Lower Valanginian143.1 - 132.6South Africa (Eastern Cape) (45929)
Berriasian - Late/Upper Valanginian143.1 - 132.6South Africa (Western Cape) (38315 38316)
Berriasian - Late/Upper Valanginian143.1 - 132.6Indian Ocean (38317)
Berriasian - Late/Upper Valanginian143.1 - 132.6South Africa (Eastern Cape) (11153 38301 38305 38307 38308 38310 38311 38312 38313)
Berriasian - Valanginian143.1 - 132.6South Africa (Eastern Cape) (28213 51903 59356 174952 175258 175259 175260)
Berriasian - Hauterivian143.1 - 125.77South Africa (Eastern Cape) (174951 174953 174954)
Valanginian137.05 - 132.6South Africa (Eastern Cape) (227048)
Aquitanian - Burdigalian23.04 - 15.98USA (New Jersey) (50944 94367 126160)
Early/Lower Miocene23.04 - 15.98USA (New Jersey) (59335 59336 59337 59364 59717 59718 59719 59720 59721 59722 59723 59724 59725 59726 59729 59734 59735 59736 59737 59738 59739 59740 59741 59742 59743 59744 59745 59746 59747 59748 59749 59750 59751 59752 59753 59754 59755 59756 59757 59758 59759 59760 59761 59784 92755 92757 92758 92759 92760 92761 92762 92763 92764 92765 92766 92767 92768 92769 111197 142356)
Miocene23.04 - 5.333USA (New Jersey) (92756)
Burdigalian20.45 - 15.98USA (New Jersey) (18587)
Early/Lower Hemingfordian18.5 - 16.3USA (New Jersey) (17910)