June 19, 2011
Detail from Geological Map of the State of Pennsylvania 1858
original here

Detail from Geological Map of the State of Pennsylvania 1858

original here

  1. manoelwilliam reblogged this from streamsofcontext
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  3. thisoldfox reblogged this from freeparkin and added:
    aww yeah, my state!
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    Oh, hey, my state.
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