Shallow-water Globigerina sediments

Abstract

Research Article| January 01, 1941 Shallow-water Globigerina sediments G. W. CRICKMAY; G. W. CRICKMAY Search for other works by this author on: GSW Google Scholar H. S. LADD; H. S. LADD Search for other works by this author on: GSW Google Scholar J. E. HOFFMEISTER J. E. HOFFMEISTER Search for other works by this author on: GSW Google Scholar Author and Article Information G. W. CRICKMAY H. S. LADD J. E. HOFFMEISTER Publisher: Geological Society of America Received: 03 Jun 1940 First Online: 02 Mar 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 1941 Geological Society of America GSA Bulletin (1941) 52 (1): 79–106. https://doi.org/10.1130/GSAB-52-79 Article history Received: 03 Jun 1940 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation G. W. CRICKMAY, H. S. LADD, J. E. HOFFMEISTER; Shallow-water Globigerina sediments. GSA Bulletin 1941;; 52 (1): 79–106. doi: https://doi.org/10.1130/GSAB-52-79 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 On Katafanga, Vanua Vatu, and Avea, three small islands in the Lau group of Eastern Fiji, occur highly calcareous Neogene sediments in which the most abundant organic remains are Globigerinidae (about 20 per cent by volume). Less abundant are calcareous red algae (0—2.0 per cent), calcareous blue-green algae (0—5.5 per cent), benthonic Foraminifera (0—4.0 per cent), coral fragments (0—22.0 per cent), echinoid spines (1.0—2.0 per cent), and brachiopods and mollusks (0—6.0 per cent).An origin in water considerably shallower than that of most Globigerina deposits is indicated by both physical and biological evidence. Diagnostic features are: fragmental oölites; interbedding of thin oölitic layers containing few Globigerinidae with beds rich in Globigerinidae; abundant calcareous mud; and high calcium carbonate content and absence of volcanic material generally present in deep-sea oozes. Biological characters of significance are the presence of fragments of reef corals, blue-green algae, and Crustacea.The above features and other evidence suggest a depth of more than 40 fathoms—the limit of flourishing reef-coral growth—but a depth not greatly in excess of this figure. Apparently the pelagic shells were brought by surface currents to an area where there was little clastic deposition and a paucity of benthonic forms. Some limestones contain a high percentage of lithified calcareous mud which appears to be similar to muds now accumulating on submarine banks and in certain coral lagoons. It is suggested that the presence of this material inhibited benthonic growth.The Fiji sediments are compared with deep-sea ooze; the supposed deep-water Globigerina limestones of Barbados, the Solomon Islands, South America; deposits on submarine banks and in the lagoons of existing atolls; shallow-water Globigerina chalk of England; Globigerina “soapstone” of Vitilevu, Fiji; and foraminiferal dune limestone of the Arabian Sea. 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.