Distribution of the iron ores mined in the Lake Superior Region in the...
America Transformed: This map depicts the geography of the iron and steel industry during the last half of the 19th century when coke from coal was introduced into the manufacturing process. Consequently, iron ... More
Tectonic plate begins to diverge
Plate Rips Apart—As the plate stretches and thins, the underlying asthenosphere flows upward and expands like a hot-air balloon, lifting the region to higher elevations; The continental crust breaks along fault... More
Keweenawan Rift Cross Section - Public Domain image, National Parks Ga...
The volcanic and sedimentary rocks of the ancient Keweenawan Rift form a downfold (”syncline”) beneath the Lake Superior region of Michigan’s Upper Peninsula. The rocks are found at the surface in National Park... More
NPS Sites along the Keweenawan Rift
Volcanic and sedimentary rocks of the ancient Keweenawan Rift are found in National Park Service sites in the Lake Superior region. Similar rocks (shown in gray) are buried beneath younger sedimentary layers in... More
Map of the states of Michigan and Wisconsin : embracing a great part o...
Public domain image of a vintage map, geography atlas, maritime navigation, age of discovery, 16th-17th century, free to use, no copyright restrictions - Picryl description
Section and diagram illustrating the geology of the region between the...
Public domain image of a vintage map, geography atlas, maritime navigation, age of discovery, 16th-17th century, free to use, no copyright restrictions - Picryl description
Map of the states of Michigan and Wisconsin : embracing a great part o...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological and topographical map of the mineral district of Lake Super...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Section and diagram illustrating the geology of the region between the...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological map of the Lake Superior land district in the state of Mich...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Map of the states of Michigan and Wisconsin : embracing a great part o...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological and topographical map of the mineral district of Lake Super...
Public domain scan of a architecture diagram, settlement map, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Section and diagram illustrating the geology of the region between the...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological map of the Lake Superior land district in the state of Mich...
Public domain image of a vintage map, geography atlas, maritime navigation, age of discovery, 16th-17th century, free to use, no copyright restrictions - Picryl description
Map of the states of Michigan and Wisconsin : embracing a great part o...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological and topographical map of the mineral district of Lake Super...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological and topographical map of the mineral district of Lake Super...
Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More
Geological and topographical map of the mineral district of Lake Super...
Public domain scan of a vintage map, city plan, atlas, cartoghraphy, free to use, no copyright restrictions - Picryl description.
Geological and topographical map of the mineral district of Lake Super...
Public domain scan of a architecture diagram, settlement map, plan, or drawing, free to use, no copyright restrictions - Picryl description.