Utica Shale

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A review of Dr. R. W. Ells's second report on the geology of a portion of the Province of Quebec, with additional notes on the Quebec Group
C. D. Walcott

American Journal of Science February 1890, s3-39 (230) 101-115; DOI: https://doi.org/10.2475/ajs.s3-39.230.101
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Description of a new genus of the order Eurypterida from the Utica Slate
C. D. Walcott

American Journal of Science March 1882, s3-23 (135) 213-216; DOI: https://doi.org/10.2475/ajs.s3-23.135.213
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On the age of the clay slates and grits of Poughkeepsie
Thomas Nelson Dale

American Journal of Science January 1879, s3-17 (97) 57-59; DOI: https://doi.org/10.2475/ajs.s3-17.97.57
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Considerations relating to the Quebec Group, and the upper copper-bearing rocks of Lake Superior
W. E. Logan

American Journal of Science May 1862, s2-33 (99) 320-327; DOI: https://doi.org/10.2475/ajs.s2-33.99.320

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