#GeologyPA

[vizcart]

From the 1960s, a (restored) school geological map of Pennsylvania, obviously with shaded relief!

🗺️ 𝗠𝗔𝗣 𝗜𝗡𝗙𝗢 Geologic map of Pennsylvania, Topographic and Geologic Survey, Commonwealth of PA, 1960. Source: David Rumsey Collection.

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