Ordovician

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The Taconic system of Emmons, and the use of the name Taconic in geologic nomenclature
Charles Doolittle Walcott

American Journal of Science March 1888, s3-35 (207) 229-242; DOI: https://doi.org/10.2475/ajs.s3-35.207.229
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Recent explorations in the Wappinger Valley limestone of Dutchess County, New York; no. 6, Discovery of additional fossiliferous Potsdam strata, and pre-Potsdam strata of the Olenellus group, near Poughkeepsie, New York
William Buck Dwight

American Journal of Science July 1887, s3-34 (199) 27-32; DOI: https://doi.org/10.2475/ajs.s3-34.199.27
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The norites of the Cortlandt Series on the Hudson River near Peekskill, NY
G. H. Williams

American Journal of Science March 1887, s3-33 (195) 191-199; DOI: https://doi.org/10.2475/ajs.s3-33.195.191
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On certain fossiliferous limestones of Columbia County, New York, and their relation to the Hudson River shales and the Taconic system
Irving Prescott Bishop

American Journal of Science December 1886, s3-32 (192) 438-441; DOI: https://doi.org/10.2475/ajs.s3-32.192.438
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The genus Strephochetus, distribution and species
Henry Martyn Seely

American Journal of Science July 1886, s3-32 (187) 31-34; DOI: https://doi.org/10.2475/ajs.s3-32.187.31
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Notice of a new genus of Lower Silurian Brachiopoda
Silas Watson Ford

American Journal of Science June 1886, s3-31 (186) 466-467; DOI: https://doi.org/10.2475/ajs.s3-31.186.466
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On Lower Silurian fossils from a limestone of the original Taconic of Emmons
James Dwight Dana

American Journal of Science April 1886, s3-31 (184) 241-248; DOI: https://doi.org/10.2475/ajs.s3-31.184.241
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...on fossils from metamorphic limestones of the Taconic series of Emmons at Canaan, New York
Silas Watson Ford and W. B. Dwight

American Journal of Science April 1886, s3-31 (184) 248-255; DOI: https://doi.org/10.2475/ajs.s3-31.184.248
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Recent explorations in the Wappinger Valley limestone of Dutchess County, New York; no. 5, Discovery of fossiliferous Potsdam strata at Poughkeepsie, New York
William Buck Dwight

American Journal of Science February 1886, s3-31 (182) 125-133; DOI: https://doi.org/10.2475/ajs.s3-31.182.125
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Preliminary notice of fossils in the Hudson river slates of the southern part of Orange County, New York, and elsewhere
Nelson Horatio Darton

American Journal of Science December 1885, s3-30 (180) 452-454; DOI: https://doi.org/10.2475/ajs.s3-30.180.452

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