April 4, 2022
Mineral samples from the North Shore
Mineral samples from the North Shore
- Spurr mine sample, date unknown. Microscopic photograph of spurr mine sample found in ground mass of amphritrite. It can be found in the Mineral Resources Research Center records.
- Berkshire mine sample, date unknown. Microscopic photograph of berkshire mine sample found in . It can be found in the Mineral Resources Research Center records.
- Eastern Mesabi sample, date unknown. Microscopic photograph of Eastern Mesabi sample found in the Mineral Resources Research Center records.