Abstract
Research Article| June 01, 1942 Phosphorite deposits on the sea floor off southern California R. S. DIETZ; R. S. DIETZ Search for other works by this author on: GSW Google Scholar K. O. EMERY; K. O. EMERY Search for other works by this author on: GSW Google Scholar F. P. SHEPARD F. P. SHEPARD Search for other works by this author on: GSW Google Scholar GSA Bulletin (1942) 53 (6): 815–848. https://doi.org/10.1130/GSAB-53-815 Article history received: 07 Nov 1940 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation R. S. DIETZ, K. O. EMERY, F. P. SHEPARD; Phosphorite deposits on the sea floor off southern California. GSA Bulletin 1942;; 53 (6): 815–848. doi: https://doi.org/10.1130/GSAB-53-815 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Dredging operations on banks, on escarpments, and on walls of submarine canyons off southern California have shown that nodular phosphorite is the most abundant type of rock in these nondepositional environments. Approximately one-third of all the rock recovered is phosphorite. Petrographic and megascopic examination reveals that the nodules are largely formed by direct precipitation, but that they enclose some replaced material. Examination also shows that the phosphorite was probably deposited essentially in situ. Miocene Foraminifera have been identified in the nodules from many of the stations, but Recent or Pleistocene faunas have also been found in some of the phosphorite. Whereas the enclosed Miocene fauna suggests a Miocene age for most of the nodules, significant nonpaleontological data indicate that this fauna has probably been reworked into more recent deposits before enclosure in the nodules. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.
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