Portal de Periódicos da CAPES

The Effects of Time-Averaging and Taphonomy on the Identification of Reefal Sub-Environments using Larger Foraminifera: Apo Reef, Mindoro, Philippines

2001; Society for Sedimentary Geology; Volume: 16; Issue: 4 Linguagem: Inglês

10.1669/0883-1351(2001)016 2.0.co;2

1938-5323

E. Charlotte Glenn-Sullivan, Ian S. Evans,

Geological formations and processes

Other| August 01, 2001 The Effects of Time-Averaging and Taphonomy on the Identification of Reefal Sub-Environments using Larger Foraminifera: Apo Reef, Mindoro, Philippines E. CHARLOTTE GLENN-SULLIVAN; E. CHARLOTTE GLENN-SULLIVAN 1Department of Geosciences, University of Houston, Houston, TX 77204-5503 Search for other works by this author on: GSW Google Scholar IAN EVANS IAN EVANS 1Department of Geosciences, University of Houston, Houston, TX 77204-5503 Search for other works by this author on: GSW Google Scholar PALAIOS (2001) 16 (4): 399–408. https://doi.org/10.1669/0883-1351(2001)016 2.0.CO;2 Article history accepted: 22 Feb 2001 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation E. CHARLOTTE GLENN-SULLIVAN, IAN EVANS; The Effects of Time-Averaging and Taphonomy on the Identification of Reefal Sub-Environments using Larger Foraminifera: Apo Reef, Mindoro, Philippines. PALAIOS 2001;; 16 (4): 399–408. doi: https://doi.org/10.1669/0883-1351(2001)016 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyPALAIOS Search Advanced Search Abstract At Apo Reef, Mindoro, a small, isolated, moderate-energy platform reef in the central Philippines, foraminifera comprise a significant portion (c.40%) of the sediment. This study examines four assemlages of foraminifera: live foraminifera; dead, unabraded foraminifera; abraded and fragmented foraminifera; and the three data sets combined into a total assemblage in order to determine their relative usefulness in identifying reefal sub-environments. The time averaged assemblages, the product of taphonomic processes, prove to be much more effective in delineating reefal physiographic sub-environments than do the live assemblages. The abundance of live foraminifera, except for minute sediment-attached rotaliines, is strongly controlled by the distribution of algal turf and filamentous algal mat. Filamentous algae, with abundant live delicate species, occur in both high- and low-energy reef zones. The time-averaged assemblages are characterized by robust calcarinids in the shallow seaward zones; by free-living miliolids and small rotaliines in the leeward zones; and by planktonics and large thin rotaliines in the fore reef. This enhanced fidelity of the time-averaged assemblages in relation to physiographic zones reflects a combination of the ecological distribution of robust, abrasion-resistant species, the selective destruction of small, delicate tests in higher-energy zones, and the failure of storms and other mechanisms to homogenize the reefal sands. You do not currently have access to this article.