POST-CAMBRIAN CLOSURE OF THE DEEP-WATER SLOPE-BASIN TAPHONOMIC WINDOW
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dc.contributor.author | Orr P.J. | |
dc.contributor.author | Benton M.J. | |
dc.contributor.author | Briggs D.E.G. | |
dc.date.accessioned | 2022-01-03T07:02:40Z | |
dc.date.available | 2022-01-03T07:02:40Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=7673482 | |
dc.identifier.citation | Geology, 2003, 31, 9, 769 | |
dc.identifier.issn | 0091-7613 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/34118 | |
dc.description.abstract | Exceptional faunas (Konservat-Lagerstaatten that preserve traces of volatile nonmineralized tissues) are statistically overabundant in the Cambrian Period; almost all examples preserved in continental-slope and shelf-basin environments are of this age. The hypothesis that an increase in the amount and complexity of bioturbation was an important agent in the elimination of this deep-water slope-basin taphonomic window is supported. Post-Cambrian ichnofaunal assemblages contain a higher proportion of pascichnia and agrichnia, ethologies produced by a mobile infauna. They also illustrate the lateral partitioning of organisms into different environmental niches; both opportunistic and equilibrium infaunas occur in low-oxygen environments in which the preservation of nonbiomineralized tissues was favored. Direct consumption of carcasses by bioturbating organisms was less important than changes to sediment properties as a result of bioturbation, notably enhanced microbial degradation of reactive organic matter, increased permeability, and the disruption of geochemical gradients necessary for mineral authigenesis. [PERIODICAL ABSTRACT] | |
dc.subject | GEOLOGY | |
dc.subject | Cambrian | |
dc.title | POST-CAMBRIAN CLOSURE OF THE DEEP-WATER SLOPE-BASIN TAPHONOMIC WINDOW | |
dc.type | Статья | |
dc.subject.age | Paleozoic::Cambrian | |
dc.subject.age | Палеозой::Кембрийская | ru |
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