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File:AmCyc Coal - Mammoth group.jpg

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Summary

Description
English: Geological diagram of “Mammoth” (or E) group in the coal measures.
Date published 1879
Source “Coal,” The American Cyclopædia, v. 4, 1879, p. 739.
Author Leo Lesquereux
Permission
(Reusing this file)
Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:AmCyc_Coal_-_Mammoth_group.jpg

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current22:56, 2 October 2018Thumbnail for version as of 22:56, 2 October 2018234 × 1,111 (65 KB)Bob Burkhardt{{Information |description ={{en|1=Geological diagram of “Mammoth” (or E) group in the coal measures.}} |date =published 1879 |source =“Coal,” ''The American Cyclopædia'', v. 4, 1879, p. 739. |author =Leo Lesquereux |permission ={{PD-1923}} }} Category:Coal Coal
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