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A Late Jurassic Carbonate Ramp Colonized by Sponges and Benthic Microbial Communities (External Prebetic, Southern Spain)

2003; Society for Sedimentary Geology; Volume: 18; Issue: 6 Linguagem: Inglês

10.1669/0883-1351(2003)018 2.0.co;2

1938-5323

Federico Olóriz, Matías Reolid, Francisco J. Rodríguez‐Tovar,

Echinoderm biology and ecology

Other| December 01, 2003 A Late Jurassic Carbonate Ramp Colonized by Sponges and Benthic Microbial Communities (External Prebetic, Southern Spain) FEDERICO OLÓRIZ; FEDERICO OLÓRIZ 1Departamento Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada. Campus Fuentenueva, Granada 18071, Spain, foloriz@ugr.es Search for other works by this author on: GSW Google Scholar MATÍAS REOLID; MATÍAS REOLID 1Departamento Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada. Campus Fuentenueva, Granada 18071, Spain, foloriz@ugr.es Search for other works by this author on: GSW Google Scholar FRANCISCO J. RODRÍGUEZ-TOVAR FRANCISCO J. RODRÍGUEZ-TOVAR 1Departamento Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada. Campus Fuentenueva, Granada 18071, Spain, foloriz@ugr.es Search for other works by this author on: GSW Google Scholar Author and Article Information FEDERICO OLÓRIZ 1Departamento Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada. Campus Fuentenueva, Granada 18071, Spain, foloriz@ugr.es MATÍAS REOLID 1Departamento Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada. Campus Fuentenueva, Granada 18071, Spain, foloriz@ugr.es FRANCISCO J. RODRÍGUEZ-TOVAR 1Departamento Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada. Campus Fuentenueva, Granada 18071, Spain, foloriz@ugr.es Publisher: SEPM Society for Sedimentary Geology Accepted: 04 Aug 2003 First Online: 03 Mar 2017 Online ISSN: 1938-5323 Print ISSN: 0883-1351 Society for Sedimentary Geology PALAIOS (2003) 18 (6): 528–545. https://doi.org/10.1669/0883-1351(2003)018 2.0.CO;2 Article history Accepted: 04 Aug 2003 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation FEDERICO OLÓRIZ, MATÍAS REOLID, FRANCISCO J. RODRÍGUEZ-TOVAR; A Late Jurassic Carbonate Ramp Colonized by Sponges and Benthic Microbial Communities (External Prebetic, Southern Spain). PALAIOS 2003;; 18 (6): 528–545. doi: https://doi.org/10.1669/0883-1351(2003)018 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 SocietyPALAIOS Search Advanced Search Abstract During the Middle to Late Oxfordian (locally ranging into the earliest Kimmeridgian), the epicontinental shelf that persisted in the southeastern paleomargin of Iberia (Prebetic Zone) was largely colonized by siliceous sponges (Dictyida, Lychniskida, and Lithistida, in descending order of abundance). Spongiolithic lithofacies (sponge-rich deposits in which buildups are rare and small) represent a marine environment extensively colonized by sponges in the form of large sponge meadows showing associated epibenthic organisms (brachiopods, bivalves, and echinoderms). Marl-limestone rhythmites represent muddy bottoms colonized by scarce endobenthos (bivalves and irregular echinoids). However, the occurrence of patchy sponge bioherms provided a favorable substrate for epibionts and microbial lithoherms (microbialites). The record of meter-scale buildups showing sponge bioherm-microbial lithoherm in marl-limestone rhythmites resulted from the preferred colonization of sponge patches by benthic microbial communities, the growth of which on surrounding muddy bottoms was very limited or impossible. Sedimentation rate, substrate, bathymetry, light, nutrients, oxygenation, and environmental (water) energy determined the eco-sedimentary conditions responsible for the occurrence and composition of spongiolithic facies in the area studied. Throughout the Late Oxfordian and the earliest Kimmeridgian, the progressive increase in the rate of sedimentation, especially influx of siliciclastics, forced the disappearance of sponge bioherms-microbial lithoherms from the Prebetic shelf. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.