(US Geological) Gray's Geological Map of the United States - World/Oceans West of the Platte are

West of the Platte are few street names we recognize today

Arrowsmith and Lewis were very skilled topographers and their material is very scarce

This map for the city of St

Carte De La Floride

(US Geological) Gray's Geological Map of the United States - World/Oceans West of the Platte areGray's Geological Map of the United States Charles Hitchcock was the son of Edward Hitchcock a distinguished geologist and educator, and Charles continued the legacy. Working in various capacities as state geologist, he also taught at Dartmouth and was later the founder of the Geological Society of America. This map is Charles basic geological map for the US and was published by Gray with hand color identifying nine different types of formations.