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The Iron Range

Title: Drawing of Iron Bearing Rocks
Type: Art
Date: 1894
Source: Josiah Spurr

Description: This drawing came from The Iron-Bearing Rocks of the Mesabi Range in Minnesota, a book that Spurr wrote in 1894.

Drawing of Iron Bearing Rocks


  1. In the first image, the iron is in the outer layer of the rock. Why isn't it in the middle too?

  2. In the second image the iron has spread to some parts of the rock, but not to other parts. How might this have happened?

  3. The last image has many layers of iron and rock. How might this have occurred?

  4. From the answers above, what are some of the things that you need to have in order to form rocks with iron in them?