Matches in SemOpenAlex for { <https://semopenalex.org/work/W1551170376> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W1551170376 abstract "Mass extinctions are important events for the evolution of life on Earth but oftenthe mechanisms behind them are poorly understood. The Eocene - Oligocene Transition(EOT) had a profound and lasting influence on global climate and, though not one ofthe “big 5” mass extinction events, widespread extinctions in many fossil groups havebeen recognised. Larger benthic foraminifera (LBF), one of the most conspicuous andwidespread fossil groups during the Eocene, are known to have experienced a rapidglobal overturning during the EOT, including the extinction of long-ranging familiessuch as the Discocyclinidae, Orbitoclypeidae, Pellatispiridae and a number of species inthe Nummulitidae. However, detailed records through the transition are rare, and fewcomplete sections are known; the timing and causes of extinctions therefore remainuncertain.Extensive field samples from the southern Tanzanian coastal region along withTanzania Drilling Project (TDP) samples are used to give an overview of Eocene toMiocene LBF and to produce high resolution stratigraphic records of LBF events acrossthe EOT. Two further important EOT sites, Fuente Caldera, Spain and Melinau Gorge,Sarawak, both with unresolved questions relating to LBF at the EOT were studied forcomparison.The field samples combined with the TDP data cover an area of approximately200 km from Kilwa to the Mozambique border. Initial comparisons with Tethyan andIndo-Pacific faunas show perhaps an intermediate assemblage in the Eocene and somesimilarities with the Indo-Pacific in the Miocene. However in both epochs there arefeatures distinctive of an East African or western Indo-Pacific fauna. Additionally, thiswork identifies many previously unreported localities and provides a solid basis forfuture work.Three of the TDP sites span the EOT and contain abundant LBF. Extensivecalcareous micro-, nannofossil and stable isotope studies of these cores allow the LBFstratigraphy to be tied to global stratigraphy. These records show that the LBFextinction event occurs close to the Eocene/Oligocene boundary (EOB), as defined bythe extinction of the planktonic foraminiferal Family Hantkeninidae, rather than at theprominent oxygen isotope excursion in the early Oligocene that signifies maximum icegrowth and global sea-level fall. New bulk isotope data from the Melinau Limestone ofSarawak further support this conclusion. In Fuente Caldera, where the extinction levelwas previously reported to be within the Oligocene, extensive reworking means that anEOB extinction is also likely at this site. This correlation raises new questions about thecause of the extinctions and has important implications for global larger benthicforaminiferal stratigraphy." @default.
- W1551170376 created "2016-06-24" @default.
- W1551170376 creator A5062985744 @default.
- W1551170376 date "2012-01-01" @default.
- W1551170376 modified "2023-09-27" @default.
- W1551170376 title "Paleogene larger benthic foraminiferaof Tanzania and the Eocene - OligoceneTransition" @default.
- W1551170376 hasPublicationYear "2012" @default.
- W1551170376 type Work @default.
- W1551170376 sameAs 1551170376 @default.
- W1551170376 citedByCount "0" @default.
- W1551170376 crossrefType "dissertation" @default.
- W1551170376 hasAuthorship W1551170376A5062985744 @default.
- W1551170376 hasConcept C101991246 @default.
- W1551170376 hasConcept C109007969 @default.
- W1551170376 hasConcept C111368507 @default.
- W1551170376 hasConcept C12294951 @default.
- W1551170376 hasConcept C125471540 @default.
- W1551170376 hasConcept C127313418 @default.
- W1551170376 hasConcept C144024400 @default.
- W1551170376 hasConcept C149923435 @default.
- W1551170376 hasConcept C151730666 @default.
- W1551170376 hasConcept C18903297 @default.
- W1551170376 hasConcept C204330871 @default.
- W1551170376 hasConcept C205649164 @default.
- W1551170376 hasConcept C2780368712 @default.
- W1551170376 hasConcept C2908647359 @default.
- W1551170376 hasConcept C35306142 @default.
- W1551170376 hasConcept C47559259 @default.
- W1551170376 hasConcept C73707237 @default.
- W1551170376 hasConcept C83042747 @default.
- W1551170376 hasConcept C86803240 @default.
- W1551170376 hasConceptScore W1551170376C101991246 @default.
- W1551170376 hasConceptScore W1551170376C109007969 @default.
- W1551170376 hasConceptScore W1551170376C111368507 @default.
- W1551170376 hasConceptScore W1551170376C12294951 @default.
- W1551170376 hasConceptScore W1551170376C125471540 @default.
- W1551170376 hasConceptScore W1551170376C127313418 @default.
- W1551170376 hasConceptScore W1551170376C144024400 @default.
- W1551170376 hasConceptScore W1551170376C149923435 @default.
- W1551170376 hasConceptScore W1551170376C151730666 @default.
- W1551170376 hasConceptScore W1551170376C18903297 @default.
- W1551170376 hasConceptScore W1551170376C204330871 @default.
- W1551170376 hasConceptScore W1551170376C205649164 @default.
- W1551170376 hasConceptScore W1551170376C2780368712 @default.
- W1551170376 hasConceptScore W1551170376C2908647359 @default.
- W1551170376 hasConceptScore W1551170376C35306142 @default.
- W1551170376 hasConceptScore W1551170376C47559259 @default.
- W1551170376 hasConceptScore W1551170376C73707237 @default.
- W1551170376 hasConceptScore W1551170376C83042747 @default.
- W1551170376 hasConceptScore W1551170376C86803240 @default.
- W1551170376 hasLocation W15511703761 @default.
- W1551170376 hasOpenAccess W1551170376 @default.
- W1551170376 hasPrimaryLocation W15511703761 @default.
- W1551170376 hasRelatedWork W1497731219 @default.
- W1551170376 hasRelatedWork W1641362570 @default.
- W1551170376 hasRelatedWork W1979015445 @default.
- W1551170376 hasRelatedWork W1987154329 @default.
- W1551170376 hasRelatedWork W2001747021 @default.
- W1551170376 hasRelatedWork W2014649410 @default.
- W1551170376 hasRelatedWork W2083569494 @default.
- W1551170376 hasRelatedWork W2131949632 @default.
- W1551170376 hasRelatedWork W2156318239 @default.
- W1551170376 hasRelatedWork W2158311065 @default.
- W1551170376 hasRelatedWork W2307637495 @default.
- W1551170376 hasRelatedWork W2530106913 @default.
- W1551170376 hasRelatedWork W2852944276 @default.
- W1551170376 hasRelatedWork W2953162456 @default.
- W1551170376 hasRelatedWork W3006372750 @default.
- W1551170376 hasRelatedWork W3080411093 @default.
- W1551170376 hasRelatedWork W3109575261 @default.
- W1551170376 hasRelatedWork W3110769861 @default.
- W1551170376 hasRelatedWork W3131895562 @default.
- W1551170376 hasRelatedWork W3136040926 @default.
- W1551170376 isParatext "false" @default.
- W1551170376 isRetracted "false" @default.
- W1551170376 magId "1551170376" @default.
- W1551170376 workType "dissertation" @default.