Search results for "quartz grains"

showing 3 items of 3 documents

An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia

2017

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 condition…

010506 paleontologyQE1-996.5Optically stimulated luminescenceEarth sciencequartz grainsGeologyBaltic states010502 geochemistry & geophysicsbaltic states01 natural sciencesduneice-dammed lakelinkuva ice-marginal zoneGeneral Earth and Planetary SciencesAeolian processesLinkuva ice-marginal zoneoptically stimulated luminescenceGeomorphologyGeology0105 earth and related environmental sciencesGeologos
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STOP 13: Inland dune field near Daugavpils, East-Latvian Lowland

2014

Allerød–Younger Dryas boundarygrain-size analysis:NATURAL SCIENCES::Earth sciences::Exogenous earth sciences::Sedimentology [Research Subject Categories]LatvianAustrumlatvijas zemiene:NATURAL SCIENCES::Earth sciences::Exogenous earth sciences::Quaternary geology [Research Subject Categories]Archaeologyrounding and surface character of quartz grainslanguage.human_languageField (geography)GeographyKvartāra ģeoloģijalanguagePhysical geographyLate Quaternary Terrestrial Processes, Sediments and History: From Glacial to Postglacial Environments
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STOP 6: Morphology, internal structure and texture of inland dunes at the Smilškalni site, Middle Gauja Lowland

2014

Morphology (linguistics)GeographyKvartāra ģeoloģijagrain-size analysisGround-penetrating radar:NATURAL SCIENCES::Earth sciences::Exogenous earth sciences::Sedimentology [Research Subject Categories]Iekšzemes kāpas (Gaujas zemiene):NATURAL SCIENCES::Earth sciences::Exogenous earth sciences::Quaternary geology [Research Subject Categories]ground penetrating radarGeomorphologyCartographyTexture (geology)rounding and surface character of quartz grainsLate Quaternary Terrestrial Processes, Sediments and History: From Glacial to Postglacial Environments
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