File:PSM V19 D558 Probable formation of asphalt after erosion.jpg

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Description Probable formation of asphalt after erosion
Date
Source Popular Science Monthly Volume 19
Author Unknown authorUnknown author
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current17:59, 21 August 2010Thumbnail for version as of 17:59, 21 August 20101,405 × 2,030 (671 KB)Ineuw{{Information |Description = Probable formation of asphalt after erosion |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_19.djvu/558 |Date = 1881 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Categor

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