Ivishak Formation

6 distinct taxa, from 8 fossil occurrences the Paleobiology Database records under this name, spanning 252–249 Mya.

Alaska · US

6 taxa · 8 fossils · 252–249 Mya

Filed under the Sadlerochit Group. Members recorded: Kavik, Fire Creek Siltstone, Ledge Sandstone.

Macrostrat places this rock in the Sadlerochit Group, and dates it 251–240 Ma. Macrostrat’s own record

Ivishak Formation — 69.30°N, 146.37°WIvishak Formation — 69.44°N, 144.61°WIvishak Formation — 69.03°N, 146.91°WIvishak Formation — 69.53°N, 145.29°W

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4 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.

When

What has been found

What else lived thenRank the rock of a period

Counts are of occurrence records, which measure the rock and the fieldwork together.