Stratigraphy, Zonation, and Age of Schaghticoke, Deepkill, and Normanskill Shales, Eastern New York

Research Article| June 01, 1962 Stratigraphy, Zonation, and Age of Schaghticoke, Deepkill, and Normanskill Shales, Eastern New York WILLIAM B. N BERRY WILLIAM B. N BERRY Dept. Paleontology, University of California, Berkley, Calif Search for other works by this author on: GSW Google Scholar Author and Article Information WILLIAM B. N BERRY Dept. Paleontology, University of California, Berkley, Calif Publisher: Geological Society of America Received: 07 Jun 1960 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1962, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1962) 73 (6): 695–718. https://doi.org/10.1130/0016-7606(1962)73[695:SZAAOS]2.0.CO;2 Article history Received: 07 Jun 1960 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation WILLIAM B. N BERRY; Stratigraphy, Zonation, and Age of Schaghticoke, Deepkill, and Normanskill Shales, Eastern New York. GSA Bulletin 1962;; 73 (6): 695–718. doi: https://doi.org/10.1130/0016-7606(1962)73[695:SZAAOS]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Graptolite-bearing black shales in eastern New York have served as the standard of reference for Ordovician graptolite successions in North America. The Schaghticoke, Deepkill, and Normanskill shales do not include a continuous sequence of Early and Middle Ordovician graptolite zones, as previously thought.The Schaghticoke Shale bears a fauna characterized by Dictyonema flabelliforme flabelliforme and Staurograptus dichotomous. An earliest Ordovician graptolite zone encompasses it.Four zonal assemblages can be delimited in the Deepkill Shale. Two are latest Early Ordovician; one is earliest Middle Ordovician; the highest is Middle Ordovician and is separated from the others by a structural discordance and a faunal gap of one zone.The Normanskill Shale bears graptolite assemblages typical of two zones and is of late Middle Ordovician age. It can be divided into four lithic members.A lithic unit comprised of huge blocks of Normanskill Shale and other older formations in a black shale matrix, which bears graptolites typical of the Canajoharie Shale, overlies the Normanskill Shale on the eastern side of the Hudson River throughout Rensselaer County and the southern part of Washington County, New York. Its exposure belt may be the western limit of the "Taconic Klippe." The unit separates apparent autochthonous from allochthonous portions of the Normanskill Shale. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.