An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia
| dc.contributor.author | Nartišs, Māris | |
| dc.contributor.author | Kalińska-Nartiša, Edyta | |
| dc.date.accessioned | 2017-06-19T12:45:00Z | |
| dc.date.available | 2017-06-19T12:45:00Z | |
| dc.date.issued | 2017-05 | |
| dc.description.abstract | 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. | pl_PL |
| dc.identifier.citation | Geologos, 2017, 23, 1, 15-28 | pl_PL |
| dc.identifier.doi | https://doi.org/10.1515/logos-2017-0002 | |
| dc.identifier.isbn | 978-83-232187-4-6 | |
| dc.identifier.issn | 1426-8981 | |
| dc.identifier.uri | http://hdl.handle.net/10593/17933 | |
| dc.language.iso | eng | pl_PL |
| dc.publisher | Instytut Geologii UAM | pl_PL |
| dc.rights | info:eu-repo/semantics/openAccess | pl_PL |
| dc.subject | dune | pl_PL |
| dc.subject | ice-dammed lake | pl_PL |
| dc.subject | quartz grains | pl_PL |
| dc.subject | optically stimulated luminescence | pl_PL |
| dc.subject | Linkuva ice-marginal zone | pl_PL |
| dc.subject | Baltic states | pl_PL |
| dc.title | An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia | pl_PL |
| dc.type | Artykuł | pl_PL |