Description

• Title:
  An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia
• Creator:
  Nartišs, Māris;
  Kalińska-Nartiša, Edyta
• Description:
  In the Middle Gauja Lowland, northeast Latvia, dunes are distributed over a vast glaciolacustrine plain that formed during the retreat of the Fennoscandian ice sheet. Such a direct contact between aeolian and glaciolacustrine sediments can be used to infer depositional settings and decipher to what extent these sediments bear an aeolian component. Our proxies, although preliminary, reveal a limited range of variation in grain-size parameters, a significant presence of quartz grains with silica precipitation and matt-surface grains of various rounding degrees and massive structure combined with horizontal lamination. These are indicative of periglacial-aeolian depositional conditions in the foreland of the Linkuva ice-marginal zone. Sedimentary characteristics do not match a single luminescence date of 9.2±0.6 ka, which significantly postdates the minimum age of the Linkuva ice-marginal zone with 10Be ages between 15.4 and 12.0 ka. Whether deposition started directly after drainage of the Middle Gauja ice-dammed lake or if there is a gap of 2.8–6.2 ka is a matter of debate; only future studies at higher OSL resolution could resolve this.
• Object availability:
  free access
• Rights: https://creativecommons.org/licenses/by-nc-nd/3.0/ ;
  Prawa autorskie (c) 2017 Māris Nartišs, Edyta Kalińska-Nartiša
• Date:
  2017.03.01
• Type:
  info:eu-repo/semantics/article;
  info:eu-repo/semantics/publishedVersion;
  Research papers
• Language:
  English
• Source:
  Geologos; Vol. 23 No. 1 (2017); 15-28;
  Geologos; Tom 23 Nr 1 (2017); 15-28;
  2080-6574;
  1426-8981
• Format:
  application/pdf
• Publisher:
  Adam Mickiewicz University Poznan
• Relation: http://pressto.amu.edu.pl/index.php/logos/article/view/logos-2017-0002/30504
• Subject:
  dune;
  ice-dammed lake;
  quartz grains;
  optically stimulated luminescence;
  Linkuva ice-marginal zone;
  Baltic States
• Identifier: http://pressto.amu.edu.pl/index.php/logos/article/view/logos-2017-0002
• Data provider:
  Platforma Otwartych Czasopism Naukowych UAM
• Can I use it?:
  seek permission
• Type:
  other