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Paleogeographic Map of North America 550 Million Years Ago

Paleogeographic map of Laurentia (proto-North America) with location of Grand Portage National Monument marked with a red star.

At this time, the Proterozoic supercontinent, Rodinia, was rifted apart and northern Minnesota was in the center of the North American (Laurentian) craton. The Paleoproterozoic sediments and Neoproterozoic volcanics were deeply buried. Red star indicates approximate present-day location of Grand Portage National Monument.

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Graphic compiled by Trista L. Thornberry-Ehrlich (Colorado State University). Base paleogeographic map is from “North American Key Time Slices” © 2013 Colorado Plateau Geosystems Inc., used under license.

Public domain:Minimum Granting Rights

Image

Grand Portage National Monument, Code: GRPO

Grand Portage National Monument, Cook County, Minnesota
Latitude: 47.999698638916, Longitude: -89.7606964111328

NPS.gov Collection

01/01/0001

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