Hopkinton Formation

123 distinct taxa, from 317 fossil occurrences the Paleobiology Database records under this name, spanning 443–433 Mya.

Iowa · US

123 taxa · 317 fossils · 443–433 Mya

Members recorded: Farmers Creek, Picture Rock, Marcus, Sweeney.

Macrostrat dates this rock 439–420 Ma. Macrostrat’s own record

Hopkinton Formation — 43.00°N, 91.00°WHopkinton Formation — 42.00°N, 91.00°WHopkinton Formation — 42.50°N, 91.50°WHopkinton Formation — 42.17°N, 90.58°WHopkinton Formation — 41.85°N, 91.82°W

Loading coastlines…

5 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

The 40 most often recorded, of 123.

What else lived thenRank the rock of a period

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