Open AccessMaximální rozšíření pleistocenního ledovcového štítu ve Vnějších Západních Karpatech a Východních Sudetech – současné znalosti a nový důkaz
Author(s) -
Martin Hanáček,
Miroslav Bubík
Publication year - 2021
Publication title -
geologické výzkumy na moravě a ve slezsku v roce .../geologické výzkumy na moravě a ve slezsku v roce ...
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.128
H-Index - 1
eISSN - 2336-4378
pISSN - 1212-6209
DOI - 10.5817/gvms2021-15631
Subject(s) - glacial period , geology , tributary , fluvial , geomorphology , shore , paleontology , ice sheet , geography , oceanography , cartography , structural basin
A single find of erratic Baltic flint in the Slezské Beskydy Mts. represents a rare evidence of glaciation in the area. The find originates from fluvial deposits of Weichselian valley terrace of the Hluchová Stream, tributary of the Olza River. The erratic was reworked from Elsterian sediments deposited by the Scandinavian Ice Sheet in a very marginal position near its maximum extent in Outer Western Carpathians. Based on morphological analysis, the surface of the erratic was abraded by wave action in the source area on the Baltic shore and subsequently by glacial and (glacio)fluvial transport. Position of the find proves the glaciation of the Olza River valley by a greater ice lobe, than previously assumed.