10 Be dating reveals pronounced Mid-to Late Holocene activity of deep-seated landslides in the highest part of the Czech Flysch Carpathians
| Autor: | Jan Lenart, Tomáš Pánek, Régis Braucher, Albert Zondervan, Michal Břežný |
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| Přispěvatelé: | Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
Archeology Lithology [SDE.MCG]Environmental Sciences/Global Changes Drainage basin Context (language use) 010502 geochemistry & geophysics Fault scarp 01 natural sciences Paleontology Hydrometeorology [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Ecology Evolution Behavior and Systematics Holocene ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics Global and Planetary Change geography geography.geographical_feature_category Flysch Geology Landslide 15. Life on land 13. Climate action |
| Zdroj: | Quaternary Science Reviews Quaternary Science Reviews, Elsevier, 2018, 195, pp.180-194. ⟨10.1016/j.quascirev.2018.07.030⟩ Quaternary Science Reviews, 2018, 195, pp.180-194. ⟨10.1016/j.quascirev.2018.07.030⟩ |
| ISSN: | 0277-3791 |
| Popis: | Although the highest part of the Czech Outer Western Carpathians lacks significant recent landslide activity, the vast area (∼20%) of their territory is occupied by relict deep-seated landslides and deep-seated gravitational slope deformations. Dating these deformations might help to determine degrees of present-day landslide hazard in that area. Based on the 10Be exposure dating of eight rocky scarps and walls of ridge-top trenches, we estimated the minimal ages of the deep-seated landslides (DSLs) and one deep-seated gravitational slope deformation (DSGSD) in the Satina River basin in the Moravskoslezske Beskydy Mts. The obtained ages (∼9.7–2.9 ka) suggest Holocene slope instability in the area with a pronounced cluster of ages spanning from ∼6.0 to 2.9 ka. Except for one DSL, the ages reveal rather episodic activity of gravitational movements. Mid-to early Late Holocene activity of large landslides in the study area corresponds to the ages of several previously dated landslides both in an adjacent region as well as within the Central European context. With respect to the historical quiescence of the DSLs and DSGSDs in the area and because the slopes have not been destabilized, even during the most extreme hydrometeorological events within the last few decades, we infer that the hydrometeorological thresholds necessary for their activation are seldom exceeded in this area. Therefore, the highest parts of the Carpathians built by rigid thick-bedded lithology reveal a rather lower frequency of events in comparison with adjacent parts formed by claystone-dominated flysch, where several large DSLs originated in the last few decades as a consequence of heavy rainfalls. |
| Databáze: | OpenAIRE |
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