Item talk:Q261473
From geokb
{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "New approach to assessing age uncertainties \u2013 The 2300-year varve chronology from Eklutna Lake, Alaska (USA)", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70216090", "url": "https://pubs.usgs.gov/publication/70216090" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70216090 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1016/j.quascirev.2018.10.018", "url": "https://doi.org/10.1016/j.quascirev.2018.10.018" } ], "journal": { "@type": "Periodical", "name": "Quaternary Science Reviews", "volumeNumber": "203", "issueNumber": null }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Quaternary Science Reviews" } ], "datePublished": "2019", "dateModified": "2023-11-08", "abstract": "Developing robust chronological frameworks of\u00a0lacustrine sediment\u00a0is central to reconstructing past environmental changes. We present\u00a0varve\u00a0chronologies from five sites extending back 2300 years from Eklutna Lake, in the Chugach Mountains of south-central Alaska. The chronologies are built from image analysis of high-resolution photographs and CT scans of\u00a0sediment cores. The age uncertainty of each record is tested by three methods. We first present varve chronologies from individual sites and reconcile the difference in varve\u00a0delimitation\u00a0from two observers. The varve chronologies from each site are then compared to each other using a series of marker beds that can be traced across the lake basin. Finally, using a new Bayesian probabilistic model, we develop age models that incorporate information regarding age uncertainty from the multiple-observer method and the age distribution of marker layers from multiple cores. To evaluate the accuracy of the Bayesian model output, we used seven radiocarbon ages from terrestrial macrofossils and four\u00a0tephra\u00a0layers traceable across the core sites. The major-element\u00a0geochemistry\u00a0of the tephra layers and their ages are presented here for the first time. 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"name": "University of Alberta" } ] }, { "@type": "Person", "name": "Haeussler, Peter J.", "givenName": "Peter J.", "familyName": "Haeussler", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-1503-6247", "url": "https://orcid.org/0000-0002-1503-6247" }, "affiliation": [ { "@type": "Organization", "name": "Alaska Science Center Geology Minerals", "url": "https://www.usgs.gov/centers/alaska-science-center" }, { "@type": "Organization", "name": "Alaska Science Center", "url": "https://www.usgs.gov/centers/alaska-science-center" } ] }, { "@type": "Person", "name": "Buchanan, Casey", "givenName": "Casey", "familyName": "Buchanan", "affiliation": [ { "@type": "Organization", "name": "University of Alberta" } ] }, { "@type": "Person", "name": "De Batist, Marc", "givenName": "Marc", "familyName": "De Batist", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-1625-2080", "url": "https://orcid.org/0000-0002-1625-2080" } } ], 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