Minnesota's lakes may be its most famous features, but the glaciated countryside disguises a much longer history of volcanoes and plate collisions--not surprisi

Have you ever wondered how the Mississippi River was formed? Or why shark teeth have been found in the Iron Range of the Upper Midwest? Towering mountain ranges

Individual park descriptions include: Jay Cooke, Gooseberry Falls, Split Rock Lighthouse, Tettegouche, George H. Crosby Manitou, Temperance River, Cascade River

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Sequence stratigraphy represents a new paradigm in geology. The principal hypothesis is that stratigraphie successions may be subdivided into discrete sequences