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Titolo:
Anatomy of a modern coral reef flat: A recorder of storms and uplift in the late Holocene
Autore:
Yamano, H; Kayanne, H; Yonekura, N;
Indirizzi:
Univ Tokyo, Dept Geog, Bunkyo Ku, Tokyo 1130033, Japan Univ Tokyo Tokyo Japan 1130033 ept Geog, Bunkyo Ku, Tokyo 1130033, Japan Japan Sci & Technol Corp, CREST, Tokyo, Japan Japan Sci & Technol Corp Tokyo Japan Technol Corp, CREST, Tokyo, Japan
Titolo Testata:
JOURNAL OF SEDIMENTARY RESEARCH
fascicolo: 2, volume: 71, anno: 2001,
parte:, B
pagine: 295 - 304
SICI:
1527-1404(200103)71:2<295:AOAMCR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
GREAT BARRIER-REEF; SEA-LEVEL; PACIFIC; ISLANDS; FORAMINIFERA; GROWTH; JAPAN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Yamano, H Natl Inst Environm Studies, Social & Environm Syst Div, 16-2 Onogawa, Tsukuba, Ibaraki 3050053, Japan Natl Inst Environm Studies 16-2 Onogawa Tsukuba Ibaraki Japan 3050053
Citazione:
H. Yamano et al., "Anatomy of a modern coral reef flat: A recorder of storms and uplift in the late Holocene", J SED RES, 71(2), 2001, pp. 295-304

Abstract

Cores from Kabira Reef, Ishigaki Island, southwest Japan, reveal the internal structure and temporal changes in sedimentary process of a complete coral reef flat, The reef crest caught up with sea level at about 4000 yr BP. Since then, it expanded oceanward and the reef pavement has grown landward,The backreef structure is composed of bioclasts derived from the reef framework. Of all the bioclasts, corals and coralline algae are most abundant. Coral fragments coarser than -3.0 phi have dominated the backreef sedimentssince about 2000 yr BP, Benthic foraminiferal tests first occurred at about 4000 yr BP, and their abundance increased significantly starting around 2000 yr BP, Shallowing of the reef crest is also indicated by the presence of the shallow-water benthic Foraminifera Baculogypsina sphaerulata tests after 2000 yr BP, The date 2000 yr BP is coincident with tectonic uplift at Kabira Reef (Kawana 1989). We consider this uplift to have caused a relativesea-level fall that aided the deposition of coral fragments transported from the reef pavement by storms. The relative sea-level fall also caused subaerial exposure of the reef crest during low tides and the transition of reef-building organisms from corals to shallow-water species of benthic Foraminifera, resulting in a change noticeable in the constituents of backreef sediments. The results of this study suggest that the coral reef Rat, and especially the backreef, can be a faithful recorder of relative sea-level changes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 08:25:14