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From mass-wasting to slope stabilization – putting constrains on a tectonically induced transition in slope erosion mode : a case study in the Judea Hills, Israel

Auteur(s) et Affiliation(s)

RYB, U.
The Fredy and Nadine Herrmann Inst. of Earth Sciences, Hebrew Univ., Jerusalem, Israel
MATMON, A.
The Fredy and Nadine Herrmann Inst. of Earth Sciences, Hebrew Univ., Jerusalem, Israel
PORAT, N.
Geological Survey of Israel, Jerusalem, Israel
KATZ, O.
Geological Survey of Israel, Jerusalem, Israel


Description :
Calcrete-coated remnants of landslide debris and alluvial deposits are exposed along the hillslopes of the Soreq drainage, Judea Hills, Israel. These remnants indicate that a transition from landslide-dominated terrain to dissolution-controlled hillslope erosion had occurred. This transition possibly occurred due to the significant decrease in tectonic uplift during the late Cenozoic. The study area is characterized by sub-humid Mediterranean climate. The drainage hillslopes are typically mantled by thick calcrete crusts overlying Upper Cretaceous marine carbonate rocks. Using TT-OSL dating of aeolian quartz grains incorporated in the calcrete which cements an ancient landslide deposit, it is concluded on the incision that invoked high frequency of landslide activity in the drainage. The ages of a younger landslide remnant, alluvial terrace, and alluvial fan, all situated only a few meters above the present level of the active streambed indicate that since 688 the Soreq base level had stabilized and that landslide activity decreased significantly by the middle Pleistocene.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 6, p. 551-560, nombre de pages : 10, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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