Anorthosite Quarry
Detailed Description
The Midcontinent region is the focus of active mineral exploration, including for mineral deposit types previously unrecognized there. Here, USGS scientists Laurel Woodruff and Suzanne Nicholson visit an anorthosite quarry, Duluth Complex, MN. Photo by K. Schulz, USGS.
Sources/Usage
Public Domain.
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