5 Member

Geology

Formation: Horseshoe Gulch

Lithologies: wackestone (8), packstone (8), "limestone" (12)

Paleoenvironments: carbonate indet. (20)

Age range: Ashgill or 449.50000 to 443.10000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Middle Ordovician - Late/Upper Ordovician471.3 - 443.1USA (California) (100865 100866 100867)
Ashgill449.5 - 443.1USA (California) (100543 100544 100545 100546 100547 100548 100549 100550 100551 100552 100553 100635 100636 100637 100638 100639 100640 100641 100642 100644 100645 100646 100647 100863 100864)