inscription
Portail d'information géographique

Résultats de la recherche (1383 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Hungary ; Karst ; Karstic landform ; Structural geomorphology
  • The most characteristic landforms of the Aggtelek Karst Region are the followings : a. karstic microforms : free karrs, covered karrs ; b. landforms of the karstic water conduit : sink holes, dolines of solution, uvalas, karstic dry valley with row
  • of dolines, draining, erosional (tectonic) karstic gorges and gullies ; c. intrinsic ensembles of landforms : karstic plateaus (planinas). - (ZK)
  • Karst ; Karstic landform ; Spain ; Valencia
  • Dolostone ; Geomorphogenesis ; Hungary ; Karst ; Karstic landform
  • In this paper, a model is presented by the authors which is suitable to explain a wealth of landforms by the specific way of karstification of the bedrock. Opposite to the karstification of limestone resulting in relief dissection, karst processes
  • in the dolomite produce superimposing residual surfaces and, after the stoppage of the retreat, conservation of these landforms. - (ZK)
  • Doline ; Hungary ; Karst ; Karstic landform ; Lithology ; Mathematical model ; Morphometry
  • in Aggtelek Karst region (NE-Hungary) is presented. Moreover, relationships between morphometrical results, lithology and karstic landform development are examined. - (JS)
  • Dolostone ; Hungary ; Karren ; Karst ; Karstic landform ; Veszprém
  • In this paper karr landforms typical for dolomite surfaces were investigated by the authors using methods of field observation, mapping and morphological analysis. Through the mapping of these landforms and of the subsurface bedrock, data were
  • obtained about mechanisms of formation and factors influencing the process. Observations were made on the circumstances of the occurence of conspicuous karr forms, and recommendations were put forward related to landform protection and nature conservation
  • Geomorphogenesis ; Geomorphology ; Hungary ; Karst ; Karstic landform ; Typology
  • Karst ; Karstic landform ; Romania ; Structural geomorphology ; Transylvania
  • Geomorphology ; Karst ; Karstic landform ; Mountain ; Romania
  • Carbonate dissolution ; Geomorphology ; History of geography ; Karst ; Karstic landform
  • Gypsum ; Karst ; Karstic landform ; Moldavia ; Romania
  • In the Tazlău Subcarpathians, that lies in the Moldavian Subcarpathians, there are some area rich in gypsum deposits. The main landforms related to these deposits are dolines, lapies, swallets and two little caves. - (M. Vârlan).
  • Sandstone dissolution landforms in the Furnas Formation, Southern Brazil
  • of subterranean erosion are the result of kaolinite dissolution, which intensifies along structural directions, in a region of scarped relief and steep hydraulic gradient. As a consequence, the Furnas Formation displays landforms that are characteristic of a both
  • structural and karstic aquifer.
  • For the first time a large-scale geomorphological mapping had been carried out in the course of search for placers| karst landforms and deposits filling karstic hollows were studied, their relative age was determined. Three stages in karstification
  • are distinguished : the Late Miocene-Pliocene, the end of the Pliocene-beginning of the Pleistocene, second half of the Pleistocene, a noticeable deceleration in the process having been traced throughout of the Late Cenozoic. Only karstic-erosional network develops
  • progressively since the Early Pleistocene. Under conditions of limited water supply the conditions do not favour the heavy minerals concentration and placers formation within the karstic-erosional network. - (L'Ed.).
  • Drumlin ; Geochemistry ; Glacial erosion ; Ireland ; Karstic landform ; Mass movement ; Mineralogy ; Pedogenesis ; Quaternary ; Soil erosion
  • The Burren in County Clare, western Ireland, is a glaciated karstic landscape with a fragmented soil and vegetation cover on a predominantly limestone substrate. A representative area was studied in order to determine the distributions of soil types
  • confirm this division and also reveal soils of mixed composition and a distinctive subtype of granite-bearing soil that occurs exclusively on drumlin-like landforms.
  • Geomorphogenesis ; Hungary ; Karst ; Karstic landform
  • Doline ; Geomorphometry ; Hungary ; Karst ; Karstic landform ; Mountain
  • Doline ; Geomorphometry ; Hungary ; Karst ; Karstic landform ; Mountain
  • Hydrogeology ; Karst ; Karstic landform ; Polje ; Pollution ; Portugal ; Water pollution
  • Carbonate rock ; Caucasus ; Former USSR ; Karst ; Karstic landform ; Taxonomy ; Typology
  • Cave ; Eastern Siberia ; Irkutsk ; Karst ; Karstic landform ; Russia ; Speleology ; Temperature
  • Dating ; Geomorphology ; Karst ; Karstic landform ; Karstification ; Model