globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.09.007
论文题名:
Fossil assemblages associated with submerged beachrock beds as indicators of environmental changes in terrigenous sediments: Examples from the Gelasian (Early Pleistocene) of Rhodes, Greece
作者: Moissette P.; Koskeridou E.; Cornée J.-J.; André J.-P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 369
起始页码: 14
结束页码: 27
语种: 英语
英文关键词: Beachrock ; Greece ; Mediterranean ; Pleistocene ; Rhodes ; Sclerobionts
英文摘要: The lower Pleistocene Kritika Member of the Rhodes Formation is composed of predominantly siliciclastic deposits that are sometimes intercalated with hardbottoms formed by drowning of former beachrock beds. A wide variety of sclerobionts occur in this environment, very different from the poorest soft-bottom populations occurring in other levels of the Kritika Member. The most characteristic, abundant and frequently diverse are the encrusting forms: coralline algae, bivalves, serpulid worms, and bryozoans. Numerous other groups of sessile and vagile organisms are associated with these crust-forming communities. A number of skeletal organisms (sometimes including zooxanthellate coral colonies) formed small carbonate buildups on top of several beachrock beds. Boring organisms also occur. Evidence for a two-step deepening succession over the previously formed beachrock is provided by palaeontological and sedimentological data. The rapidly cemented sandy-conglomeratic beds were first colonised by a relatively shallow-water (around 20. m) biocoenosis of mostly encrusting organisms. Another association, with encrusting and erect organisms, was later established in a deeper environment (20-40. m). A comparison with Holocene beachrock occurring on the coast of Rhodes was also undertaken. Their submerged part provided habitat for poorer but similar biotas to those occurring in the Kritika Member. The lower Pleistocene beachrock and associated organogenic fossil assemblages indicate repeated drowning episodes during deposition of the Kritika Member and provide help in sequence stratigraphic interpretations of these siliciclastic deposits. Notably, they can be used as indicators of relative sea-level changes. © 2012 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69888
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作者单位: UMR 5276 CNRS, Laboratoire de Géologie de Lyon, Université Lyon 1, 69622 Villeurbanne Cedex, France; Department of Historical Geology and Paleontology, University of Athens, Panepistimiopolis, 15784 Athens, Greece; UMR 5243 CNRS, Géosciences Montpellier, Université Montpellier II, CC 60, pl. Eugène Bataillon, 34095 Montpellier Cedex 05, France; Département de Géologie, BIAF, Université d'Angers, 2 Bd Lavoisier, 49045 Angers Cedex 01, France

Recommended Citation:
Moissette P.,Koskeridou E.,Cornée J.-J.,et al. Fossil assemblages associated with submerged beachrock beds as indicators of environmental changes in terrigenous sediments: Examples from the Gelasian (Early Pleistocene) of Rhodes, Greece[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,369
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