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Coral growth bands: A new and easy to use paleothermometer in paleoenvironment analysis and paleoceanography (late Miocene, Greece)

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dc.contributor Australian Institute Of Marine Science
dc.contributor Inst Geowissensch
dc.contributor Johannes Gutenberg Univ Mainz
dc.contributor Johannes Gutenberg University Of Mainz
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en LOUGH, JANICE M. BRACHERT, THOMAS C. REUTER, MARKUS KROEGER, KARSTEN F. 2017-03-21T00:51:12Z 2017-03-21T00:51:12Z 2013-02-28T06:45:46Z 2019-05-09T01:19:05Z 2017-03-21T00:51:12Z 2017-03-21T00:51:12Z 2013-02-28T06:45:46Z 2019-05-09T01:19:05Z 2006-12-19
dc.identifier 7269 en
dc.identifier.citation Brachert TC, Reuter M, Kroeger KF and Lough JM (2006) Coral growth bands: a new and easy to use palaeothermometer in paleoenvironmental analysis and paleoceanography (late Miocene, Greece). Paleoceanography. 21. en
dc.identifier.issn 0883-8305
dc.description Link to abstract/full text - en
dc.description.abstract [ 1] Modern scleractinian corals are classical components of marine shallow warm water ecosystems. Their occurrence and diversity patterns in the geological record have been widely used to infer past climates and environmental conditions. Coral skeletal composition data reflecting the nature of the coral environment are often affected by diagenetic alteration. Ghost structures of annual growth rhythms are, however, often well preserved in the transformed skeleton. We show that these relicts represent a valuable source of information on growth conditions of fossil corals. Annual growth bands were measured in massive hemispherical Porites of late Miocene age from the island of Crete ( Greece) that were found in patch reefs and level bottom associations of attached mixed clastic environments as well as isolated carbonate environments. The Miocene corals grew slowly, about 2 - 4 mm yr(-1), compatible with present-day Porites from high-latitude reefs. Slow annual growth of the Miocene corals is in good agreement with the position of Crete at the margin of the Miocene reef belt. Within a given time slice, extension rates were lowest in level bottom environments and highest in attached inshore reef systems. Because sea surface temperatures (SSTs) can be expected to be uniform within a time slice, spatial variations in extension rates must reflect local variations in light levels ( low in the level bottom communities) and nutrients ( high in the attached reef systems). During the late Miocene (Tortonian - early Messinian), maximum linear extension rates remained remarkably constant within seven chronostratigraphic units, and if the relationship of SSTs and annual growth rates observed for modern massive Indo-Pacific Porites spp. applies to the Neogene, minimum ( winter) SSTs were 20 degrees - 21 degrees C. Although our paleoclimatic record has a low resolution, it fits the trends revealed by global data sets. In the near future we expect this new and easy to use Porites thermometer to add important new information to our understanding of Neogene climate.
dc.description.uri en
dc.language English
dc.language en en
dc.relation.ispartof Null
dc.relation.ispartof Paleoceanography - pages: 21 en
dc.subject Sea-surface Temperature
dc.subject Basin
dc.subject High-latitude Reefs
dc.subject Benthic Foraminifera
dc.subject Porites Corals
dc.subject Western Pacific
dc.subject Climate-change
dc.subject Paleontology
dc.subject Variability
dc.subject Crete Greece
dc.subject Geosciences, Multidisciplinary
dc.subject Oceanography
dc.subject Circulation
dc.subject Geology
dc.title Coral growth bands: A new and easy to use paleothermometer in paleoenvironment analysis and paleoceanography (late Miocene, Greece)
dc.type journal article en
dc.identifier.doi 10.1029/2006PA001288
dc.identifier.wos WOS:000243110700001

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