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.
Details
Image Dimensions: 1000 x 750
Location Taken: Duluth, MN, US