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Silurian Rocks in North America Today

Explore: the Silurian in
or world paleogeography of the
Geologic activity over the last 417 million years has removed or covered up most Silurian rocks. Well-preserved fossils from Silurian reefs can be found in the Great Lake States of Minnesota, Wisconsin, Michigan, and Illinois. Silurian rocks can also be found exposed in the Appalachian Mountains, in several provinces of Canada, and in northern Mexico.

View modern exposures of rock from
each time period in North America:

Quaternary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Precambrian

Silurian Fossils
Fossil photos from Silurian

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