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From the 1960s, a (restored) school geological map of Pennsylvania, obviously with shaded relief!
πΊοΈ π ππ£ ππ‘ππ’ Geologic map of Pennsylvania, Topographic and Geologic Survey, Commonwealth of PA, 1960. Source: David Rumsey Collection.
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#Pennsylvania#pittsburgh#usmap#mapdesign#GeologyPA#VintageMap#PennsylvaniaHistory#ShadedRelief#GeologicHeritage#PAExploration#RockFormation#GeologicalTreasure#EarthScience#PennsylvaniaGeology#GeologicWonders#LandscapeHistory#GeologicalArt#ElevationData#GeologicMapping#BedrockGeology#NaturalHistory#GeospatialData#GeologicFeatures#MapArt#vizart
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