Great Lakes Echo - Environmental news of the Great Lakes region

Great Lakes Echo (https://greatlakesecho.org/2010/07/26/monday-mashup-great-lakes-tapestry-map/picture-2-9/)

Picture 2

Published July 23, 2010 at 230 × 162 in MONDAY MASHUP: Great Lakes tapestry map

This tapestry map is a combination of geology and topography. Photo: U.S.G.S.