This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . DAWSON METAMORPHIC ROCKS OF NOVA SCOTIA the ochrey red ore The irregularity of its distribution would result from that of the carbonate of iron which where it now occurs in the vein is seen to be confusedly mixed with the ankerite It might also happen that the heat