Bulletin de la Société Géologique de France · 1966 · 10 citations · 0 references
Natural SciencesEarth SciencesGeologyPetrologyStratigraphyVolcanologyCaldera FormationEffusive VolcanismExplosive VolcanismVolcanic DeformationVolcanic PetrologyVolcanic RocksBasaltic VolcanismVolcanic Caldera CollapseVolcanic Crater MorphologyVolcanic Craters
Abstract In this preliminary study of the Guelb Tenoumer, the authors determine the distribution of the lavas and their nature: they are not basalts as might be supposed from their appearance, but rhyodacites. No fact can at present support the hypothesis of a meteoritic or explosive origin of this crater which the authors consider as a collapse caldera, apparently of a type with ring-dikes.