Principal petrographic characteristics and K-Ar isotope-geochronological data on samples from the Keli Volcanic Highland, Greater Caucasus
- Lebedev, V A
- Vashakidze, G T
- Arutyunyan, E V
- Yakushev, A I
DOIAbstract
The paper reports newly obtained stratigraphic, petrographic, and isotope geochronology data on modern moderately acid lavas from the Keli Highland of the Greater Caucasus and presents a geological map of the territory, in which 35 volcanoes active in Late Quaternary time were documented by the authors. Total duration of volcanic activity at the highland was estimated at 250 ka. Volcanic activity was discrete and occurred in three phases: Middle Neopleistocene (245-170 ka), Late Neopleistocene (135-70 ka), and Late Neopleistocene-Holocene (<30 ka). Newly obtained lines of evidence indicate that certain volcanoes erupted in the latest Neopleistocene-Holocene. The first phase of volcanic activity was connected mainly with lava volcanoes, and ...
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