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File:PSM V49 D175 Map of ancient st lawrence river and tributaries.jpg

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Description J.W. Spencer's 1890 map of the ancient Laurentian River
Date
Source Popular Science Monthly Volume 49 see also http://images.maritimehistoryofthegreatlakes.ca/553/data?n=7
Author Creator:J.W. Spencer
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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. The original can be found here: Popular Science Monthly Volume 49.

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current10:40, 29 March 2011Thumbnail for version as of 10:40, 29 March 20112,611 × 1,632 (328 KB)Ineuw{{Information |Description = Map of ancient Saint Lawrence river and tributaries |Source = [http://www.archive.org/details/popularsciencemo49newy Popular Science Monthly Volume 49] |Date = 1896 |Author = Unknown |Permissi

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