Show simple item record

dc.contributor.authorLane, Christineen
dc.contributor.authorMartin-Jones, Catherineen
dc.contributor.authorJohnson, TCen
dc.date.accessioned2018-10-31T06:50:59Z
dc.date.available2018-10-31T06:50:59Z
dc.date.issued2018-01-01en
dc.identifier.issn0959-6836
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/284427
dc.description.abstractThe sediment record from Lake Victoria is an important archive of regional environmental and climatic conditions, reaching back more than 15,000 cal. years before present (15 ka BP). As the largest lake by area in East Africa, its evolution is key to understanding regional palaeohydrological change during the Late Pleistocene and Holocene, including controls on the Nile River flow. As well as important palaeoenvironmental proxies, the lake contains a unique record of explosive volcanism from the central Kenyan Rift, in the form of fine-grained volcanic ash (tephra) layers, interpreted as airfall deposits. In the V95-1P core, collected from the central northern basin of the lake, tephra layers vary in concentration from 10’s to 10’s of 1000’s of glass shards per gram of sediment. None of the tephra are visible to the naked eye, and have only been revealed through careful laboratory processing. Compositional analyses of tephra glass shards has allowed the tephra layers to be correlated to previously unrecognized eruptions of Eburru volcano around 1.2 and 3.8 ka, and Olkaria volcano, prior to 15 ka. These volcanoes lie ~300 km east of the core site in the Kenyan Rift. Our results highlight the potential for developing cryptotephra analysis as a key tool in East African palaeolimnological research. Tephra layers offer opportunities for precise correlation of palaeoenvironmental sequences, as well as windows into the eruption frequency of regional volcanoes and the dispersal of volcanic ash.
dc.description.sponsorshipLeverhulme Trust Early Career Fellowship
dc.publisherSAGE
dc.titleA cryptotephra record from the Lake Victoria sediment core record of holocene palaeoenvironmental changeen
dc.typeArticle
prism.endingPage1917
prism.issueIdentifier12en
prism.publicationDate2018en
prism.publicationNameHoloceneen
prism.startingPage1909
prism.volume28en
dc.identifier.doi10.17863/CAM.31799
dcterms.dateAccepted2018-06-26en
rioxxterms.versionofrecord10.1177/0959683618798163en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-01-01en
dc.contributor.orcidLane, Christine [0000-0001-9206-3903]
dc.identifier.eissn1477-0911
rioxxterms.typeJournal Article/Reviewen
rioxxterms.freetoread.startdate2019-09-21


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record