Articles for tag: ancient geology Michigan, Anishinaabe legends, Gichi-Gami, isle royale, Keweenaw Peninsula, Lake Superior geology, Michigan Upper Peninsula, Midcontinent Rift, Mishipeshu, Pictured Rocks, Porcupine Mountains, volcanic Michigan

The Billion-Year-Old Crack That Shaped Lake Superior

From Lake of the Clouds to Isle Royale, discover how a failed split in Earth’s crust created some of Michigan’s most iconic landscapes. Photo: The richly colored sandstone cliffs and sculpted archways of Pictured Rocks National Lakeshore reveal layers of sediment laid down as ancient inland seas filled the Midcontinent Rift basin. Photo by Alexeys ...