File:PSM V19 D557 Probable formation of asphalt before erosion.jpg

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Description Probable formation of asphalt before erosion
Date
Source Popular Science Monthly Volume 19
Author Unknown authorUnknown author
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current17:58, 21 August 2010Thumbnail for version as of 17:58, 21 August 20101,409 × 2,015 (691 KB)Ineuw{{Information |Description = Probable formation of asphalt before erosion |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_19.djvu/557 |Date = 1881 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Catego

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