Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic

ABSTRACT Relict frost wedges are widespread and valuable indicators of past environmental conditions that have been extensively dated across central and western European lowlands over the past few decades, but their timing in the Czech Republic is poorly known. Here, we present optically‐stimulated‐...

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Bibliographic Details
Published in:Permafrost and periglacial processes 2024-07, Vol.35 (3), p.294-383
Main Authors: Uxa, Tomáš, Křížek, Marek, Krause, David, Moska, Piotr, Murton, Julian
Format: Article
Language:English
Subjects:
Age
Archives & records
Central Europe
Climate models
Climatic conditions
Environmental conditions
Environmental impact
Frost
frost wedges
Glaciation
Ground temperatures
Ice sheets
Late Pleistocene
Lowlands
Luminescence
numerical dating
Permafrost
Quaternary
Sea level
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Summary:ABSTRACT Relict frost wedges are widespread and valuable indicators of past environmental conditions that have been extensively dated across central and western European lowlands over the past few decades, but their timing in the Czech Republic is poorly known. Here, we present optically‐stimulated‐luminescence (OSL) ages for seven relict frost wedges situated at four study sites in north–central Bohemia, Czech Republic (49.9992–50.4956°N, 13.3736–16.0011°E, 230–350 m above sea level). The OSL ages indicate that the frost wedges developed during two phases in marine isotope stage 2: an older phase that peaked at 23.6 ± 2.9 ka and a younger phase that peaked at 16.1 ± 1.3 ka. Both phases probably experienced cold, dry and windy conditions that were mostly associated with
ISSN:1045-6740
1099-1530
DOI:10.1002/ppp.2241