Systematics, environment, and biogeography of some late Cambrian and early Ordovician trilobites from eastern New York State Taylor, Michael E. creator author. Halley, Robert B. author. Geological Survey (U.S.) issuing body. text bibliography dcu 1974 monographic eng remote 1 online resource (iv, 38 pages, 4 unnumbered pages of plates) : illustrations, maps. by Michael E. Taylor and Robert B. Halley. Title from title screen (viewed October 2, 2014). "Late Cambrian and early Ordovician trilobites, eastern New York State." "The environmental setting and regional significance of two trilobite assemblages from shelf deposits of the Whitehall Formation in the southern Champlain Valley." Includes bibliographical references (pages 33-36) and index. n-us-ny Paleontology Cambrian Paleontology Ordovician Paleontology New York (State) Trilobites New York (State) Cambrian Geologic Period Ordovician Geologic Period Paleontology Trilobites New York (State) From 425 to 570 million years ago fast I 19.16:834 I 19.16:834 Systematics, environment, and biogeography of some late Cambrian and early Ordovician trilobites from eastern New York State Taylor, Michael E. (DLC) 73600315 (OCoLC)1091578 Geological Survey professional paper ; 834 https://purl.fdlp.gov/GPO/gpo88819 COP 141123 20211120182711.0 in00004007361 eng