of mineralogical, paleontological, sedimentological and absolute K/Ar age of basalts, the profiles were placed into the transition from Paleogene to Neogene and stratigraphic correlation was suggested.
A group of Ar-K dating data of volcanic rocks in Taiwan Island is listed in this paper, which clarifies the data of volcanic activity. This volcanic activity is closely related with plate movement since Mesozoic. Now there are still manifestations
The aim of this paper is to shed some light onto the neotectonic evolution of the Karasu Rift based on K-Ar dating of its volcanism, age and type of faulting during the Plio-Quaternary period.
Canada ; Dating ; Glaciation ; K/Ar dating ; Palaeo-environment ; Pleistocene ; Quaternary ; Tephrochronology ; Thermoluminescence ; Yukon
on the timing of extensive Pleistocene glaciations that affected this area. This approach relies on the tephrochronological method, augmented by glass-fission-track, K-Ar, and TL (thermoluminescence) ages, which are supported at some localities by paleomagnetic
TRENTE DATATIONS K-AR DE FORMATIONS VOLCANIQUES PLIOCENES ET PLEISTOCENES PERMETTENT UNE DEFINITION PLUS PRECISE DES ALTERNANCES DE PERIODES D'ACTIVITE VOLCANIQUE (4,4 A 37 M.A. B.P. ET APRES 2,8 M.A.) ET DE PERIODES D'EROSION (9,6 A 4,4 M.A. ET 3,7
Le granite peralcalin du lac Brisson est daté à 1189 32 Ma par une isochrone Rb/Sr de roches totales. Ce résultat est confirmé par des mesures K/Ar sur amphiboles qui donnent un âge moyen de 1163 21 Ma. Cet âge permet d'assimiler le magmatisme
Datation Ar 40/Ar 39 ; Datation C 14 ; Eolien ; Géochronologie ; Italie ; Italie centrale ; Paléo-environnement ; Poussière éolienne ; Quaternaire ; Sédiment lacustre ; Téphrochronologie
. The chronology is based on C 14 and Ar/Ar dating and tephra analysis. Pollen data provide the paleoenvironmental framework and enable correlation between the cores. The main source of dust loading over the Mediterranean now, North Africa, may have played
Douze ans d'observations phytodynamiques sur des plateaux permanents de culture abandonnée dans la région bruxelloise. (Secondary succession on abandoned cropland in the Brussels ares)
Etablissement de la géochronologie du Parc National de Yellowstone à partir de datations (pollens, C14, K/Ar) des tufs rhyolitiques et des sédiments lacustres interglaciaires pour la période comprise entre 2000000 et 13650ans av. J.-C. (C. Gaulin).