File:Portlock 1843 Geology Londonderry b30458250 Plate 05.jpg

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English: From: Report on the Geology of the County of Londonderry, and of Parts of Tyrone and Fermanagh (1843)
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Source https://archive.org/details/b30458250
Author Joseph Ellison Portlock (1794-1864)

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current21:01, 8 July 2023Thumbnail for version as of 21:01, 8 July 20232,100 × 3,150 (1.54 MB)Kognos (talk | contribs)Uploaded a work by Joseph Ellison Portlock (1794-1864) from https://archive.org/details/b30458250 with UploadWizard

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