inscription
Portail d'information géographique

Résultats de la recherche (8 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • The purpose of this article is to examine cosmogenic production of 3He in a basalt flow with a very well-constrained age, to use that production rate to date other geologic events such as flood events and volcanic eruptions, and to discuss problems
  • 1990
  • in the recent geologic past| and 3) to conclude whether these two parameters remain coupled today.
  • 1990
  • This study emphasizes the complexity of karstic limnocrenic lake environments where natural geological and hydrological processes interact. This study also demonstrates the necessity to use adequate seismic material, with a large frequency spectrum
  • 1990
  • This paper presents the results of a marine geological survey of the South Orkney Plateau. Field work for this project was conducted during the austral summer of 1985 and consisted of piston coring and the acquisition of high-resolution (sparker
  • 1990
  • This paper reports on a radiocarbon-dated fossil pecan encountered during archaeological and geological study of the Mississipi River valley between Burlington and Muscatine, Iowa, and discusses the fossil pollen record to clarify the Holocene
  • 1990
  • The objective was to generate a reliable geological background of this arctic area with very low anthropogenic charges for further investigations into the processes of chemical weathering and evolution of chemical composition of : surface and ground
  • 1990
  • A geologic investigation of the northern part of Door Peninsula, Wisconsin for a state funded water quality project revealed that karstification of the Silurian aquifer is more extensive than previously believed. Sinkholes and small insurgent
  • 1990
  • in soils and ground water. Finally, the importance of studying the geological environment incidence on indoor is presented.
  • 1990