File:Second Geological Survey of Pennsylvania Report of Progress PPP plate 1.jpg

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Description Second Geological Survey of Pennsylvania. Report of Progress. PPP. Plate 1
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Source California/Internet Archive
Author Charles Emerson Beecher (1856-1904), James Hall (1811-1898), John Peter Lesley (1819-1903), John Simpson Africa (1832-1900)
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current22:33, 20 June 2011Thumbnail for version as of 22:33, 20 June 20111,202 × 2,147 (854 KB)Enomil (talk | contribs)Reverted to version as of 22:32, 20 June 2011
22:32, 20 June 2011Thumbnail for version as of 22:32, 20 June 20111,191 × 2,144 (744 KB)Enomil (talk | contribs){{Information |Description=Second Geological Survey of Pennsylvania. Report of Progress. PPP. Plate 2 |Source=[http://babel.hathitrust.org/cgi/pt?id=uc2.ark:/13960/t9g44vp57 California/Internet Archive] |Date=1884 |Author=Charles Emerson Beecher (1856-190
22:32, 20 June 2011Thumbnail for version as of 22:32, 20 June 20111,202 × 2,147 (854 KB)Enomil (talk | contribs){{Information |Description=Second Geological Survey of Pennsylvania. Report of Progress. PPP. Plate 1 |Source=[http://babel.hathitrust.org/cgi/pt?id=uc2.ark:/13960/t9g44vp57 California/Internet Archive] |Date=1884 |Author=Charles Emerson Beecher (1856-190

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