dc.contributor.author | Kalińska, Edyta | |
dc.contributor.author | Alexanderson, Helena | |
dc.contributor.author | Krievāns, Māris | |
dc.date.accessioned | 2021-02-11T14:13:04Z | |
dc.date.available | 2021-02-11T14:13:04Z | |
dc.date.issued | 2020-09-08 | |
dc.description.abstract | In interstadial deposits, sand interbeds gain limited consideration in
comparison with organic sediments, and therefore tend to be
underrepresented in paleoenvironmental reconstructions. The Raunis
site, central-eastern Latvia, is an example where organic beds have
already gained some attention and been used to understand the
complex interactions between advance and retreat of the Scandinavian
Ice Sheet in the region. Sandy interlayers have so far not been
investigated in detail and their time of deposition has also been
unknown, therefore exploring these clastic-organic sediment alternation
is of interest. This study provides a new set of luminescence datings
along with sedimentological information from the character of individual
quartz grains as detected from scanning electron microscope analysis.
Sandy interlayers are dated to between 12 and 122 ka. Fast component
OSL signal dominates in all investigated samples, but several samples
have broad and/or skewed dose distributions. Only one sample is
considered reliable and provides an age of 12.0 ± 0.6 ka. A radiocarbon
age from organic sediments in the same unit yields an age of 14 025 ±
270 cal y BP. These two dates do not agree within 2 sigma, and this is
likely related to reservoir and hard water effects of the radiocarbon
sample. Sediments at the Raunis site fall into the Greenland Interstadial
1, but more detailed specification is not possible. The rest of the OSL
ages are older than expected, likely due to incomplete bleaching during
deposition. This means that stratigraphic reliability of this key site is
likely hampered for further regional correlation. | en_US |
dc.description | This is an Accepted Manuscript version of the following article: Kalińska, E., Alexanderson, H. & Krievāns, M. (2020). The Raunis section, central Latvia, revisited: first luminescence results and re-evaluation of a key Baltic States stratigraphic site. <i>Geografiska Annaler: Series A, Physical Geography, 102</i>(4), 376-396. It is deposited under the terms of the <a href=http://creativecommons.org/licenses/by-nc/4.0/>Creative Commons Attribution-NonCommercial License</a>, which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. | en_US |
dc.identifier.citation | Kalińska, E., Alexanderson, H. & Krievāns, M. (2020). The Raunis section, central Latvia, revisited: first luminescence results and re-evaluation of a key Baltic States stratigraphic site. <i>Geografiska Annaler: Series A, Physical Geography, 102</i>(4), 376-396. | en_US |
dc.identifier.cristinID | FRIDAID 1872873 | |
dc.identifier.doi | 10.1080/04353676.2020.1813982 | |
dc.identifier.issn | 0435-3676 | |
dc.identifier.issn | 1468-0459 | |
dc.identifier.uri | https://hdl.handle.net/10037/20558 | |
dc.language.iso | eng | en_US |
dc.publisher | Taylor & Francis | en_US |
dc.relation.journal | Geografiska Annaler | |
dc.rights.accessRights | openAccess | en_US |
dc.rights.holder | Copyright 2020 The Author(s) | en_US |
dc.subject | VDP::Matematikk og naturvitenskap: 400::Geofag: 450 | en_US |
dc.subject | VDP::Mathematics and natural scienses: 400::Geosciences: 450 | en_US |
dc.title | The Raunis section, central Latvia, revisited: first luminescence results and re-evaluation of a key Baltic States stratigraphic site | en_US |
dc.type.version | acceptedVersion | en_US |
dc.type | Journal article | en_US |
dc.type | Tidsskriftartikkel | en_US |
dc.type | Peer reviewed | en_US |