Secular variations in dolomite abundance in deep marine sediments

Research Article| November 01, 1985 Secular variations in dolomite abundance in deep marine sediments David N. Lumsden David N. Lumsden 1Department of Geology, Memphis State University, Memphis, Tennessee 38152 Search for other works by this author on: GSW Google Scholar Author and Article Information David N. Lumsden 1Department of Geology, Memphis State University, Memphis, Tennessee 38152 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1985) 13 (11): 766–769. https://doi.org/10.1130/0091-7613(1985)13<766:SVIDAI>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation David N. Lumsden; Secular variations in dolomite abundance in deep marine sediments. Geology 1985;; 13 (11): 766–769. doi: https://doi.org/10.1130/0091-7613(1985)13<766:SVIDAI>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 Change with time in the amount of dolomite in post-Jurassic deep marine sediments was tabulated using 844 Deep Sea Drilling Project samples that contain 5% or more dolomite and could be suitably dated. Superimposed on an overall decrease since Early Cretaceous time are two maxima in the Cretaceous, a maximum at the Paleocene/Eocene transition, and a maximum in the Neogene. Frequency trends in the Atlantic and Indo-Pacific are similar overall but differ in detail. Mediterranean and Red Sea data are Neogene and peak in the mid-Miocene and late Miocene to early Pliocene, respectively. Data from the Gulf-Caribbean are largely Neogene and suggest deepening since early Cenozoic time. The general similarity of the patterns in the Atlantic and Indo-Pacific, supported by data from the smaller basins, suggests that the frequency of occurrence of dolomite in deep marine sediments may be related to a common global cause, possibly the flooding and draining of shallow shelves and small ocean basins consequent upon eustatic sea-level changes. 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.