L'étude de la faille du Ponsul (Portugal Central), longue de 120 km (85 km au Portugal) a montré, en certains endroits, un rejeu en faille inverse, probablement au Quaternaire, avec un déplacement vertical cumulé de 100 m. La géométrie de l'accident
Differential erosion ; Europe ; Fault ; Fault scarp ; France ; Neotectonics ; Orogeny ; Pliocene ; Pyrénées ; Quaternary ; Seismicity ; Spain ; Tectonics ; Vertical movement
spectaculaires inversions par érosion différentielle. D'autre part les grands escarpements à facettes associés à des failles normales ne peuvent s'expliquer par l'exhumation, des rejeux extensifs sont prouvés.
a engendré le rejeu d'accidents décrochants senestres N140 et a provoqué la subsidence des bassins favorisant en combinaison avec d'anciennes failles normales de direction N60, la montée du magma dans la région de la Basse Tafna (4,5 MA) et dans la région
d'orientation souvent liés au rejeu de certains accidents mais, surtout, en fonction des fluctuations majeures des niveaux de base, du Tertiaire à nos jours. En conclusion, l'A. retrace l'histoire du karst des calanques en se basant sur 3 repères géologiques
Zur tektonischen Bearbeitung von Bohrkernen. (Tectonical treatment of drill cores)
Methodological references are given concerning the collection, documentation and evaluation of structural tectonic elements of cores. This is followed by the discussion of the most important results of investigation which are not only of regional
importance but of general interest with respect to tectonic questions, particularly joint tectonics. (HL).
In this review, the A. examines the important developments in tectonic geomorphology at a wide range of spatial and temporal scales and the growing interest of geologists in geomorphology in general, and tectonic geomorphology in particular
The relationship between mass movements and tectonic lineaments is investigated in the Pliocene sand and clay terrains of Montepulciano (Central Italy). Field mapping of geological and geomorphological features, remote sensing, aerial photograph
interpretation and morphometric analysis are used to determine the strength of the relationship between tectonics and landslides.
Strukturtektonische Arbeitsmethoden der Glazialtektonik. (Structural-tectonic working methods in glacial tectonic)
Structural tectonic working methods as used in the foundation rock and in the rock mechanics can be applied to the survey, documentation and interpretation of glacigenous deformations. Introducingly, experience in the finding-out of the pebbles
Occasional references to the relative tectonic instability of the Australian continent have been published over the last hundred years. Despite this, it was repeatedly claimed that the shield lands in particular were tectonically stable
, and as recently as this century reference has been made to a concept embracing a tectonically inert continent. However, analyses of seismicity and faulting and regional geological mapping revealed widely distributed tectonic forms and especially fault-related
The aim of this paper is to model the sensitive of drainage systems to increased regional gradient at both the river-network scale and gully-system scale. The research is applied to a semi-arid region experiencing extensional tectonic activity
. The main assumption made throughout the paper is that large-scale tectonic stresses cause geological blocks to tilt and this has a profound influence on the drainage systems.
This paper reports the investigations aimed at defining some aspects of Quaternary landscape features and their relationships to tectonic structures. The fundamental principles of, and assumptions about, landsurface analysis are presented. After
a brief summary of the most important observations made on the terrace sequences and structural features, the tectonic implications and a hypothetical field-based model are discussed.
The AA. report new field observations on stratigraphy, sedimentology, and geochemical data of plutonic rocks of the Shyok suture zone separaring the Ladakh terane to the SW from the Karakoram terrane to the NE. Six tectonic units have been
distinguished. The AA. outline the geology along a transect in the Nubra-Shyok river valleys. They describe a thick sedimentary-volcanic succession yielding Middle Cretaceous foraminifera. They also discuss the tectonic implications for regional correlation
Morphometric analysis and its relation to tectonics in Macaronesia
Atlantic Ocean ; Azores ; Canary Islands ; Cape Verde ; Fault ; Geomorphometry ; Island ; Madeira ; Model ; Plate tectonics ; Portugal ; Tectonics ; Volcanism
For an investigation of the relation between the morphology and the tectonics in the Macaronesian Islands (i.e. the geographical group of middle Atlantic Islands between 10°N and 40°N, orientations studies have been made of steeply dipping joints
of volcanic origin, has been significantly codesigned by tectonic processes.