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.
This study uses relicts of Pleistocene sediments and paleosols scattered throughout the Southern Negev Desert to reconstruct the Early to Middle Pleistocene tectonic deformation. The structural and morphological positions of these relicts
is examined in relation to the main structural elements in the area and to the present drainage network. The transition from Early to Late Pleistocene drainage patterns is then reconstructed in light of the tectonic activity along the main fault systems
The study area (Algarve) is located near the Eurasia-Africa plate boundary, experiencing significant tectonic and seismic activities. Regional geology is characterised by the presence of Mesozoic and Miocene carbonate rocks which are affected
by karst phenomena. The AA. describe the structures observed in the sedimentary cover that may result from the progressive solution of underlying limestones, and then discuss the possible tectonic meaning of at least some of these structures.
Sicily owes ita complex geological structure to a switch in tectonic regime from the Mesozoic to the Tertiary. A set of tectonic units outcrops in the northern portion of the island that originated during the Tertiary at the expense
The clear relation between phreatic speleothem growth and the contemporary sea level allows the control of the tectonic evolution of an area, by comparing speleothems'ages and heights with the regionally established eustatic curves. In the studied
region different altimetric positions of coeval phreatic speleothems suggest the existence of a recent tectonic activity. The characteristics and chronology of this tectonic event are the objectives of this paper, pointing out at the same time
Geomorphic history and fluvial responses to active tectonics and climate change in an uplifted forearc region, Pacific coast of southern Costa Rica, Central America
Climate ; Costa Rica ; Dating ; Fluvial terrace ; Geology ; Geomorphology ; Hydrology ; Pacific Region ; Plate tectonics ; Quaternary ; Sedimentology ; Tectonics
, the recent development has been examined, the relevance of tectonic activity during the Quaternary is discussed and its possible repercussion on the present-day morphology of the Serra Gelada is assessed.
Along the Jurassic escarpment of Monte Kumeta (western Sicily), the opening of neptunian dikes is related either to extensional tectonics or to dilatation due to down-slope sliding. Crosscutting relationships coupled with biostratigraphic data
Integration of landform and structural analysis allowed the identification of Late Pleistocene-Holocene pulses of tectonic activity in the Campos do Jordão Plateau with ages and regimes similar to the ones from the continental rift. Recognition
of these tectonic pulses as well as of their effects in landform development, particularly clear on the Campos de São Francisco at the highest area of the SE edge of the plateau, show that besides the climate-related Quaternary environmental changes significant
First, it is important to acknowledge that channel and valley properties respond to long-term effects of climate change and tectonic activity and, secondly, in the short-term, information on the intrinsic characteristics and evolution of rivers
basins ; whereas the Neogene extension was mostly localised in the Sicilian foreland. These normal faults, randomly oriented with respect to the subsequent tectonic transport direction, have produced different geometries in the footwall of the normal
Channel geometry ; Drainage network ; Fiji ; Fluvial capture ; Geomorphology ; Longitudinal section ; River bed ; River diversion ; Stream ; Tectonics ; Vertical movement
The Navua River on the main island of Fidji displays anomalous drainage features and associated fluvial forms. The aim of this paper is to present a case history where tectonic damming and diversion provide a more appropriate explanation than river
Geomorphic data combined with stratigraphic studies provide significant information to constrain timing and amount of fault movement. The lower Narmada valley lies astride the Narmada-Son Fault (NSF), an important ENE-WSW-trending tectonic element
responsible for the current intraplate seismicity being experienced in the central part of the Indian plate. Varying nature and degree of tectonic movements along the NSF during Late Pleistocene and Holocene have produced 4 geomorphic surfaces in the lower
Diapir ; Geological structure ; Geomorphology ; Hydrogeology ; Louisiana ; Mining activity ; Model ; Natural resources ; Quaternary ; Resource management ; Salt ; Tectonics ; United States of America ; Vertical movement
and environmental geology, salt tectonics and structure, Quaternaire stratigraphy, and ground water and surface water hydrology. The A. introduces a conceptual salt dome landscape model and outlines a strategy for salt dome utilization that has goals of both safe
in areas of considerable tectonic disturbance. The geochemistry of the ground ice is the result of cryogenic processes that cause salt differentiation during water freezing, together with natural solute concentration and cryogenic mineral formation.