Middle Triassic orbital signature recorded in the shallow-marine Latemar carbonate buildup (Dolomites, Italy)

Abstract

Research Article| December 01, 2001 Middle Triassic orbital signature recorded in the shallow-marine Latemar carbonate buildup (Dolomites, Italy) Nereo Preto; Nereo Preto 1Department of Geology, Paleontology and Geophysics, University of Padova, Via Giotto, 1, 35137 Padova, Italy Search for other works by this author on: GSW Google Scholar Linda A. Hinnov; Linda A. Hinnov 2Morton K. Blaustein Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA Search for other works by this author on: GSW Google Scholar Lawrence A. Hardie; Lawrence A. Hardie 2Morton K. Blaustein Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA Search for other works by this author on: GSW Google Scholar Vittorio De Zanche Vittorio De Zanche 3Department of Geology, Paleontology and Geophysics, University of Padova, Via Giotto, 1, 35137 Padova, Italy Search for other works by this author on: GSW Google Scholar Author and Article Information Nereo Preto 1Department of Geology, Paleontology and Geophysics, University of Padova, Via Giotto, 1, 35137 Padova, Italy Linda A. Hinnov 2Morton K. Blaustein Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA Lawrence A. Hardie 2Morton K. Blaustein Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA Vittorio De Zanche 3Department of Geology, Paleontology and Geophysics, University of Padova, Via Giotto, 1, 35137 Padova, Italy Publisher: Geological Society of America Received: 17 May 2001 Revision Received: 20 Aug 2001 Accepted: 29 Aug 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (12): 1123–1126. https://doi.org/10.1130/0091-7613(2001)029<1123:MTOSRI>2.0.CO;2 Article history Received: 17 May 2001 Revision Received: 20 Aug 2001 Accepted: 29 Aug 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Nereo Preto, Linda A. Hinnov, Lawrence A. Hardie, Vittorio De Zanche; Middle Triassic orbital signature recorded in the shallow-marine Latemar carbonate buildup (Dolomites, Italy). Geology 2001;; 29 (12): 1123–1126. doi: https://doi.org/10.1130/0091-7613(2001)029<1123:MTOSRI>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 A new time-frequency analysis of sea-level–controlled carbonate-platform cycles in the Middle Triassic Latemar massif (Dolomites, Italy) reveals a strong depositional signature with characteristics of dominant forcing by climatic precession. Modes corresponding to long and short precession components at 1/(21.7 k.y.) and 1/(17.6 k.y.) underwent amplitude modulations matching Earth's orbital eccentricity with major frequency components at 1/(400 k.y.), 1/(125 k.y.), and 1/(98 k.y.). Obliquity appears as a minor component at 1/(35.4 k.y.). The Latemar signature thus constitutes the oldest pristine Milankovitch signature yet observed in the geologic record. Its fidelity rivals that of the Pliocene-Pleistocene record originally used to confirm the theory of orbitally forced climates. This evidence deepens a widely noted disagreement between radiometric and cyclostratigraphic time scales for the Latemar buildup. The Latemar cycles indicate that orbitally forced sea-level oscillations were operative in the ice-free Middle Triassic hothouse world. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.