Cow Head Group

Geology

Formations: unnamed (10), Green Point (59), Shallow Bay (125)

Lithologies: not reported (4), mudstone (8), "shale" (11), siltstone (5), conglomerate (44), lime mudstone (23), wackestone (31), packstone (65), grainstone (51), "reef rocks" (3), "limestone" (28)

Paleoenvironments: marine indet. (22), carbonate indet. (43), shallow subtidal indet. (13), platform/shelf-margin reef (16), offshore shelf (46), slope (51), submarine fan (3)

Age range: base of the Arcadian to the top of the Arenig or 509.00000 to 466.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Solvan510.2 - 504.5Canada (Newfoundland and Labrador) (10812 10813 10814 10815 10816 10817 10818 10819 10820 10821 10822 10823 10824 10825 10826 10827 10828 10829 10830 10831 10832 10833 10834 10835 10836 10837 10838 10839 10840 10841 10842 10843 10844 10845 10846 10847 10848 10849 10850 10851 10852 10853)
Arcadian509.0 - 498.4Canada (Newfoundland and Labrador) (9635 9689 9690 10768)
Middle Cambrian509.0 - 497.0Canada (Newfoundland and Labrador) (9676 9679 9682 9683 9685 9686 9688)
Marjumian504.5 - 497.0Canada (Newfoundland and Labrador) (9632 9633 9634 9636 9637 9638 9639 9640 9641 9642 9643 9644 9678 9646 9668 9669 9671 9672 9673 9680 9681 9684 9687 9691 9695)
Steptoean497.0 - 493.5Canada (Newfoundland and Labrador) (127446 127447 127448 127449 127450 127451 235510)
Dresbachian497.0 - 485.4Canada (Newfoundland and Labrador) (9692 9693 9694 9696 9697 9698 9699 9700 9701 9702 9703)
Franconian497.0 - 485.4Canada (Newfoundland and Labrador) (90965 90966 90967 90968)
Sunwaptan493.5 - 487.5Canada (Newfoundland and Labrador) (10769 81269 81270 81271 81272 81273 81277 81284 81285 81286 81287 81288)
Trempealeauan492.5 - 485.4Canada (Newfoundland and Labrador) (90969 90970 90971 105856 105857 105858 105869 105870 105871 203835 203836 203837 203838 203839)
Tremadoc486.5 - 477.7Canada (Newfoundland and Labrador) (78090 78091)
Migneintian485.4 - 478.6Canada (Newfoundland and Labrador) (3306 204409 204410 204411 204412)
Tremadocian485.4 - 477.7Canada (Newfoundland and Labrador) (105854 81289 81290 105855 105863 105867 105868 106423 234138 234141 234142 234143)
Early/Lower Ordovician - Middle Ordovician485.4 - 458.4Canada (Newfoundland and Labrador) (10771)
Arenig478.6 - 466.0Canada (Newfoundland and Labrador) (78092 78093 78094 78095 78096 80771 80772 80774)
Floian477.7 - 470.0Canada (Newfoundland and Labrador) (10770 10772)
Rangerian470.0 - 470.3Canada (Newfoundland and Labrador) (56140)
Dapingian470.0 - 467.3Canada (Newfoundland) (210467 210468 210461 210462 210463 210464 210465 210469 210470 210472 210474 210494 210496 210497 210498 210500 210501)
Llanvirn468.0 - 458.4Canada (Newfoundland and Labrador) (78097 78098 78099)
Darriwilian467.3 - 458.4Canada (Newfoundland) (210475 210477 210478 210479 210480 210481 210482 210483 210484 210485 210486 210487 210488 210490 210489 210502 210503)