Pliocene

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The southern extension of the Appomattox Formation
W. J. McGee

American Journal of Science July 1890, s3-40 (235) 15-41; DOI: https://doi.org/10.2475/ajs.s3-40.235.15
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Three formations of the Middle Atlantic slope
W. J. McGee

American Journal of Science June 1888, s3-35 (210) 448-466; DOI: https://doi.org/10.2475/ajs.s3-35.210.448
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The hot springs and geysers of the Yellowstone and Firehole rivers
F. V. Hayden

American Journal of Science March 1872, s3-3 (15) 161-176; DOI: https://doi.org/10.2475/ajs.s3-3.15.161
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Remarks on the sedimentary formations of New South Wales
W. B. Clarke

American Journal of Science May 1868, s2-45 (135) 334-353; DOI: https://doi.org/10.2475/ajs.s2-45.135.334

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