Demersal habitat of Late Cretaceous ammonoids: Evidence from oxygen isotopes for the Campanian (Late Cretaceous) northwestern Pacific thermal structure

Research Article| February 01, 2003 Demersal habitat of Late Cretaceous ammonoids: Evidence from oxygen isotopes for the Campanian (Late Cretaceous) northwestern Pacific thermal structure Kazuyoshi Moriya; Kazuyoshi Moriya 1Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Search for other works by this author on: GSW Google Scholar Hiroshi Nishi; Hiroshi Nishi 2Department of Earth Science, Graduate School of Social and Cultural Studies, Kyushu University, 4-2-1 Ropponmatsu, Chuo-ku, Fukuoka 810-8560, Japan Search for other works by this author on: GSW Google Scholar Hodaka Kawahata; Hodaka Kawahata 3National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan, and Department of Geoenvironmental Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Search for other works by this author on: GSW Google Scholar Kazushige Tanabe; Kazushige Tanabe 4Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Search for other works by this author on: GSW Google Scholar Yokichi Takayanagi Yokichi Takayanagi 5Department of Geoenvironmental Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Kazuyoshi Moriya 1Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Hiroshi Nishi 2Department of Earth Science, Graduate School of Social and Cultural Studies, Kyushu University, 4-2-1 Ropponmatsu, Chuo-ku, Fukuoka 810-8560, Japan Hodaka Kawahata 3National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan, and Department of Geoenvironmental Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Kazushige Tanabe 4Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Yokichi Takayanagi 5Department of Geoenvironmental Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Publisher: Geological Society of America Received: 19 Jul 2002 Revision Received: 17 Oct 2002 Accepted: 21 Oct 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (2): 167–170. https://doi.org/10.1130/0091-7613(2003)031<0167:DHOLCA>2.0.CO;2 Article history Received: 19 Jul 2002 Revision Received: 17 Oct 2002 Accepted: 21 Oct 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Kazuyoshi Moriya, Hiroshi Nishi, Hodaka Kawahata, Kazushige Tanabe, Yokichi Takayanagi; Demersal habitat of Late Cretaceous ammonoids: Evidence from oxygen isotopes for the Campanian (Late Cretaceous) northwestern Pacific thermal structure. Geology 2003;; 31 (2): 167–170. doi: https://doi.org/10.1130/0091-7613(2003)031<0167:DHOLCA>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 SocietyGeology Search Advanced Search Abstract Comparison of oxygen isotope data for exceptionally well preserved cooccurring plankton and benthos from the Campanian of Hokkaido, Japan, with nine species of ammonoids clearly indicates the demersal (nektobenthic) habitat of ammonoids; unlike Nautilus, the ammonoids studied did not engage in significant short-term vertical migrations in the water column. The new foraminiferal isotopic data suggest that sea-surface and sea-bottom temperatures were ∼26 and 18 °C, respectively, at 40°N in the Campanian northwestern Pacific. The temperatures were significantly warmer than those in the modern northwest Pacific. This finding provides the first reliable evidence for the warm Late Cretaceous mid-latitude North Pacific. Isotopic analyses of ammonoids show that the average calcification temperature of all ammonoid shells analyzed was ∼19 °C, comparable to those of cooccurring benthos. None of these ammonoids display calcification temperatures equivalent to those of planktonic foraminifers. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.