File:PSM V49 D381 Stages of the ice age in the us and canada.jpg

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Description

Stages of the Ice age in the USA and Canada

Date
Source Popular Science Monthly Volume 49
Author Unknown
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Extracted image from book, to grayscale, cropped whitespace. Modifications made by Ineuw.

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current22:45, 3 April 2011Thumbnail for version as of 22:45, 3 April 20113,192 × 1,808 (908 KB)Ineuw{{Information |Description = Stages of the Ice age in the USA and Canada |Source = [http://www.archive.org/details/popularsciencemo49newy Popular Science Monthly Volume 49] |Date = 1896 |Author = Unknown |Permission =