inscription
Portail d'information géographique

Résultats de la recherche (14 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • The land clearing and stumping problem: nature, causes and some solutions
  • Tree stumps in a standing position have been discovered in 20 to 40 meters of water in Toyama Bay. Radiocarbon dated samples from two of these stumps yielded ages of 8480 70 and 9060 80 years B.P. indicating that the stumps are remnants of a forest
  • The aim of this study was to investigate biomechanical effects of trees beyond treethrow, particularly displacement by tree growth and the potential for transport of regolith material into stump holes. Specifically, they sought to document
  • the extent of surface displacement (as indicated by rock fragments) and formation of stump rot depressions; to estimate the importance of these biomechanical effects relative to uprooting; and to identify common patterns of soil and regolith development
  • ; Stratigraphie ; Stump Cross Cave
  • Cave sediments from Stump Cross Cave in northern England contain Pleistocene mammal remains. Uranium-series dating of calcium carbonate deposits closely associated with the fossiliferous horizons has established an absolute age of 83,000 6000 yr BP
  • This paper examines the physical dimensions of 2 colocated distinct flood hazards, terminal lake flooding and wetland flooding, in the Stump Lake closed subbasin within the prairie landscape in north-central North Dakota. The AA. review the physical
  • basis of each flood type. This analysis will establish the magnitude of wetland flooding in comparison to terminal lake flooding in the study area. Stump Lake flooding is spatially restricted and has had limited impact upon the surrounding lakeshore
  • . There are the floating chronologies of black oaks (Quercus velutina) : 2 200-1 830, 1 230-1 030, 930-670 BP and the stumps hewn by man. Deposition of the fallen trees may be related to the phases of the increased activity of the Vistula. - (DG)
  • with previously published delta O 18 data from Pyramid Lake. The timing of these droughts also agrees with the ages of submerged rooted stumps in the Eastern Sierra Nevada and woodrat midden data from central Nevada. Prolonged drought episodes appear to correspond
  • stumps (measured by means of the water drop penetration time test, WDPT). However, at burned Q. coccifera microsites, SWR was destroyed by fire. Partial correlation analysis at burned microsites revealed that SMC and WDPT are influenced by the SOM