At Posse, primary gold mineralization occurs near the base of a sequence of metamorphosed volcanic and volcaniclastic rocks. During the Velhas geomorphologicalcycle (Oligocene to Lower Pleistocene) the region experienced extensive lateritization
. The observed gold distribution in the weathering profile has arisen through saprolitization during the Velhas cycle, then leaching, compaction and downward (and limited lateral) transport of gold during pedogenesis. The climatic and geomorphological history
Shifting paradigms in geomorphology : the fate of research ideas in an educational context
Geomorphology in the public eye : policy issues, education, and the public. Special issue
Concept ; Drainage network ; Earth surface processes ; Eighteenth Century ; Erosion cycle ; Geomorphology ; Glacial features ; History of ideas ; Mass movement ; Nineteenth Century ; Runoff ; Teaching of geography ; Tectonics ; Twentieth Century
Concept ; Cycle d'érosion ; Ecoulement ; Enseignement de la géographie ; Glaciaire ; Géomorphodynamique ; Géomorphologie ; Histoire des idées ; Mouvement de masse ; Réseau de drainage ; Siècle 18 ; Siècle 19 ; Siècle 20 ; Tectonique
The acceptance of new ideas into the mainstream of geomorphological education is illustrated from the development of theories dealing with Earth history, glaciation, uniform flow, mass movement, continental mobility, cyclic erosion, and drainage
Luminescence dating applications in geomorphological research
New techniques in geomorphology. Special issue
of the method. The luminescence techniques are increasingly being incorporated into a wide range of geomorphological studies which seek to establish the nature of landscape changes over the past interglacial-glacial cycle and beyond.
Through the interpretation of sedimentological, geomorphological, paleoclimatic and tectonic information the geomorphic evolution of the Transdanubian Mountains from the Cretaceous to the Quaternary is presented. Several sedimentary cycles occurred
Changing the face of the earth-engineering geomorphology
Antarctique ; Cycle gel-dégel ; Fracture ; Géotechnique ; Impact ; Matériaux de construction ; Météorisation ; Radiation ; Roche ; Température ; Zone froide
Antarctica ; Building materials ; Cold area ; Fracture ; Freeze-thaw cycle ; Geotechnics ; Impact ; Radiation ; Rock ; Temperature ; Weathering
Recent geomorphological studies have shown the importance of thermal stress in cold regions by means of high-frequency rock temperature data which can identify rates of temperature change in excess. The occurence of weathered material in cold
in the hydrogeological system of the Hévíz lake. The paleogeographical reconstruction was based on large-scale geological models. A special attention was paid to the geomorphological control on sedimentation and karstification. The consequences of differential erosion
Argentina ; Cenozoic ; Erosion cycle ; Erosion surface ; Fault ; Geomorphogenesis ; Mesozoic ; Model ; Palaeogeomorphology ; Palaeozoic ; Vertical movement
levelled the regional relief are identified by using geomorphological, geometrical structural and sedimentological criteria. Due to the Pampean faulting and uplifting during the last 10 Ma, almost all surfaces have been broken and tilted. The described
An appraisal of the geographical and geomorphological processes influencing sanitary microbial levels in upland areas in Applied geomorphology.
Bactérie ; Bassin-versant ; Cycle de l'eau ; Escherichia coli ; Géographie physique ; Géomorphologie appliquée ; Qualité de l'eau ; Technique de recherche
Le contenu bactériologique de l'eau est une mesure fondamentale de la qualité de l'eau mais peu d'essais ont été faits pour identifier les influences géomorphologiques au sein du cycle bactérien. Les influences géomorphologiques sont délimitées en
Polish geographical investigations in different climato-geomorphological zones. Special issue
Capacité de charge ; Cycle de l'eau ; Fluviatile ; Haute montagne ; Hydrodynamique ; Montagne ; Pologne ; Tatry ; Zone tempérée
Carrying capacity ; Fluvial processes ; High mountain ; Hydrodynamics ; Mid-latitude zone;Temperate zone ; Mountain ; Poland ; Tatra Mountains ; Water cycle;Water circulation
On the basis of the 12 years of field studies (1975-1987) regularities in the dynamics of high mountain fluvial system in an annual cycle have been determined. The results have been compared with the results obtained for other high mountain regions