This image has been taken from scan 000043 from "On American Geological History. [With “Plan of Development in the Geological History of North America. With a map. By J. D. Dana”.] (Extracted from the American More
This image has been taken from scan 000009 from "On American Geological History. [With “Plan of Development in the Geological History of North America. With a map. By J. D. Dana”.] (Extracted from the American More