The Macumber Formation of the Maritime Provinces, Canada--A Mississippian Analogue to Recent Strand-Line Carbonates of the Persian Gulf

Abstract

Other| June 01, 1967 The Macumber Formation of the Maritime Provinces, Canada; a Mississippian analogue to Recent strand-line carbonates of the Persian Gulf Paul E. Schenk Paul E. Schenk Dalhousie Univ., Dep. Geol., Halifax, NS, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Paul E. Schenk Dalhousie Univ., Dep. Geol., Halifax, NS, Canada Publisher: SEPM Society for Sedimentary Geology First Online: 03 Mar 2017 Online ISSN: 1938-3681 Print ISSN: 1527-1404 GeoRef, Copyright 2006, American Geological Institute. Journal of Sedimentary Research (1967) 37 (2): 365–376. https://doi.org/10.1306/74D716D6-2B21-11D7-8648000102C1865D Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Paul E. Schenk; The Macumber Formation of the Maritime Provinces, Canada; a Mississippian analogue to Recent strand-line carbonates of the Persian Gulf. Journal of Sedimentary Research 1967;; 37 (2): 365–376. doi: https://doi.org/10.1306/74D716D6-2B21-11D7-8648000102C1865D 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 SocietyJournal of Sedimentary Research Search Advanced Search Abstract The Macumber Formation is the most distinctive and widespread carbonate of the Windsor Group (Mississippian). The formation is divisible typically into two distinct lithosomes. Lithosome A, the lower unit, is a slabby, thickly laminated, cross-stratified, pelletted, oncolitic, sparsely fossiliferous limestone. Lithosome B, the upper unit, is a fissile, thinly laminated, vuggy, dolomitic, unfossiliferous, mud-cracked, brecciated, algal stromatolite. Discontinuous, thick, boulder-sized calcirudite near the top of the lithosome has been called the Pembroke Formation. The carbonate of the Macumber and Pembroke Formations is overlain by red, gypsiferous, terrigenous lutite, marl, or locally, coarse, thick, red fanglomerate. Both Lithosome A and B are almost identical to strand-line carbonates of the Persian Gulf, Bahaman Islands, Florida Bay, and Australia. Lithosome A was deposited in the shallow subtidal to intertidal zone; Lithosome B in the high intertidal to low subtidal zone. The Macumber Formation and overlying lithosomes of the basal Windsor Group record sudden marine transgression followed by slow regression. Underlying red terrigenous detritus is overlain by subtidal then intertidal carbonate. Overlying high intertidal and low supratidal carbonates were fragmented by desiccation and scour, the clasts heaped into channel-fill breccia in all dimensions. This breccia, in part the Pembroke Formation, is a natural consequence of the Macumber environment. Penecontemporaneous dolomite, gypsum, and/or red terrigenous detritus record passage of the hypersaline, high-supratidal environment over the depositional site. The lateral progression of bio- and lithosomes is interpreted from both vertical and longitudinal profiles. The seaward succession of lithotopes is from red, terrigenous, usually fine-grained alluvial fans to supratidal, dolomitizing salt flats with saline lakes and lagoons, through strandline carbonates with channels and algal mats to shallow, restricted lagoons, and finally toward more turbulent, more normal marine conditions. Rock units of the basal Windsor Group record environment, but not time except along depositional strike. 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.