<abstract xmlns="http://www.w3.org/1999/xhtml"><p>We found ubiquitous evidence of ongoing slope instability by analysing the variability of tree-ring eccentricity index in trees growing on three apparently relict landslide slopes in the Sudetes (Poland, Central Europe). Slow movement of these landslide bodies occurs in the present-day conditions and is recorded almost every year, although with variable intensity. Correlation of dendrochronological record with the rainfall record from a nearby station in Mieroszów for the 1977–2007 period is very poor for two deep-seated rotational slides at Mt Suchawa and Mt Turzyna but considerably better for a shallow flowslide at Mt Garbatka. While this may reflect higher permeability of heavily jointed rocks involved in deep-seated sliding this could be linked with imperfections in the rainfall record. Dendrochronology proved capable of detecting minor displacements within landslides which otherwise show no geomorphic evidence of recent activity. Therefore, claims for the entirely relict nature of the landslides are not substantiated.</p></abstract>

We found ubiquitous evidence of ongoing slope instability by analysing the variability of tree-ring eccentricity index in trees growing on three apparently relict landslide slopes in the Sudetes (Poland, Central Europe). Slow movement of these landslide bodies occurs in the present-day conditions and is recorded almost every year, although with variable intensity. Correlation of dendrochronological record with the rainfall record from a nearby station in Mieroszów for the 1977–2007 period is very poor for two deep-seated rotational slides at Mt Suchawa and Mt Turzyna but considerably better for a shallow flowslide at Mt Garbatka. While this may reflect higher permeability of heavily jointed rocks involved in deep-seated sliding this could be linked with imperfections in the rainfall record. Dendrochronology proved capable of detecting minor displacements within landslides which otherwise show no geomorphic evidence of recent activity. Therefore, claims for the entirely relict nature of the landslides are not substantiated.

Activity of Slow-Moving Landslides Recorded in Eccentric Tree Rings of Norway Spruce Trees (<italic>Picea Abies</italic> Karst.) — An Example from the Kamienne MTS. (Sudetes MTS., Central Europe)

Faculty of Earth Sciences, University of Silesia, Będzińska 60, 41–200 Sosnowiec,

Institute of Geography and Regional Development, University of Wrocław, Pl. Uniwersytecki 1, 50—137 Wrocław,

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Activity of Slow-Moving Landslides Recorded in Eccentric Tree Rings of Norway Spruce Trees ( Karst.) — An Example from the Kamienne MTS. (Sudetes MTS., Central Europe)

We found ubiquitous evidence of ongoing slope instability by analysing the variability of tree-ring eccentricity index in trees growing on three apparently...

Activity of Slow-Moving Landslides Recorded in Eccentric Tree Rings of Norway Spruce Trees (Picea Abies Karst.) — An Example from the Kamienne MTS. (Sudetes MTS., Central Europe)

Article Category: Research Article

Published Online: Apr 13, 2016

Page range: 24 - 37

Received: Jul 12, 2015

Accepted: Jan 11, 2016

DOI: https://doi.org/10.1515/geochr-2015-0028

Keywords
relict landslides, tree-ring eccentricity, dendrochronology, Sudetes

©2015 I. Malik

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Activity of Slow-Moving Landslides Recorded in Eccentric Tree Rings of Norway Spruce Trees (Picea Abies Karst.) — An Example from the Kamienne MTS. (Sudetes MTS., Central Europe)

Article Category: Research Article

Published Online: Apr 13, 2016

Page range: 24 - 37

Received: Jul 12, 2015

Accepted: Jan 11, 2016

DOI: https://doi.org/10.1515/geochr-2015-0028

Keywordsrelict landslides, tree-ring eccentricity, dendrochronology, Sudetes

©2015 I. Malik

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
relict landslides, tree-ring eccentricity, dendrochronology, Sudetes