South Asia is rich in Lower Paleolithic Acheulian sites. These have been attributed to the Middle Pleistocene on basis of a small number dates, with few older but disputed age estimates. Here, we report new ages from excavated site Attirampakkam, where paleomagnetic measurements and direct (26)Al/(10)Be burial dating stone artifacts now position earliest levels as no younger than 1.07 million years ago (Ma), pooled average 1.51 ± 0.07 Ma. results reveal that, during Early Pleistocene, India...

The 1500-km-long Western Ghats mountain barrier of peninsular India interacts with the southwest monsoon in a manner which bears heavily on exceptionally varied climate pattern Deccan. Karnataka Province alone concentrates five six major types entire Indian Union. This review explores interactions between atmospheric structure over South Asia and relief discusses efficiency passive margin uplift, second only to Himalayan barrier, acts as climatic gatekeeper subcontinent. Particular attention...

We present a chronology of ice recession in the eastern Pyrenees based on situ -produced 10 Be data obtained from Têt paleoglacier complex. The sampling strategy is relative provided by detailed geomorphological map glacial landforms. Results indicate that last maximum advance occurred late (i.e., during Marine Isotope Stage 2) compared to currently established for rest Pyrenees. Despite debatable evidence readvance Oldest Dryas stade, ice-cap melt-out was rapid, residual cirque glaciers...

Research Article| October 01, 2010 Small, isolated glacial catchments as priority targets for cosmogenic surface exposure dating of Pleistocene climate fluctuations, southeastern Pyrenees Raimon Pallàs; Pallàs 1Departament Geodinàmica i Geofísica, Universitat de Barcelona, 08028 Spain Search other works by this author on: GSW Google Scholar Ángel Rodés; Rodés Régis Braucher; Braucher 2Centre Recherche et d'Enseignement en Géosciences l'Environnement, (CEREGE, UMR) 6635 CNRS Aix Marseille...

We present new results on the long‐term throw rates of active normal faults in North Baikal Rift (NBR), eastern Siberia, based a statistical analysis triangular faceted scarps. Fault‐bounded ridges NBR display typical morphologies with several contiguous facets separated by fault‐perpendicular catchments. Over range 20 fault segments analyzed, facet heights vary from ∼200 to >900 m. As scarps have been developing under similar climatic conditions, we infer that scatter mean height arises...

Abstract The erosional pattern of passive margins often follows the fabric ancient, compressional geological structures exposed by topographic energy rifting. As erosion cuts into these belted outcrop systems they impose initial and boundary conditions that steer drainage recession plateau edge control escarpment‐forming conditions. Pattern therefore controls process. Although generic surface process models predict scarp patterns retreat in settings devoid heterogeneity, tend to do so only...

This first overview of large‐scale rock slope failure (RSF) in the yrenees addresses eastern third range. Around 30 principal RSFs greater than 0.25 km2 and 20 lesser or uncertain cases have been identified from remote imagery groundtruthing. Compared with other European mountain ranges, RSF incidence is relatively sparse, displays no obvious regional trend spatial clustering, occurs across diverse landscape types, if mainly on metamorphic rocks. A transition observed paraglacial formerly...

The Lachambre cave network (Eastern Pyrenees, France) is well suited to studying the interaction between vertical successions of low-gradient passages in limestone and chronosequences fluvial terraces adjacent valley. Investigations here focus on striking parallel Têt River, their topographic, geomorphological, sedimentological geochronological relationship with two youngest generations Pleistocene terrace, T2 T1. Results reveal that longitudinal profiles modern thalweg (1.5–3%) are ten...

The Gulf of Aden is a young, obliquely opening, oceanic basin where tectonic structures can easily be followed and correlated from the passive margins to active mid‐oceanic ridge. It an ideal laboratory for studies continental lithosphere breakup rifting spreading. northeastern margin offers opportunity study on land deformation associated with oblique over wide area encompassing two segments margin, either side Socotra fracture zone, exhibiting distinct morphologic, stratigraphic,...

We present a combined surface processes and tectonic model which allows us to determine the climatic parameters that control development of faceted spurs at normal fault scarps. Sensitivity tests parameter values are performed. For given precipitation rate, when hillslope diffusion is high channel bedrock highly resistant erosion, scarp smooth undissected. When, instead, easily eroded limited, numerous channels develop becomes deeply incised. Between these two end‐member states, incision...

We first provide a critical review of statistical procedures employed in the literature for testing uncertainty digital terrain analysis, then focus on several aspects spatial autocorrelation that have been neglected analysis gridded elevation data. When applied to derivatives such as topographic slope, approach using Moran’s I and LISA (Local Indicator Spatial Association) allows: (1) georeferenced data patterns be generated; (2) error hot- coldspots located; (3) propagation during DEM...