TY JOUR TI The Elbrus Caldera in the Northern Caucasus: Geological structure and time of formation KW Elbrus Caldera KW geological structure KW time of formation. JO Russian Journal of Earth Sciences AU Gurbanov, A.G. AU Bogatikov, O.A. AU Melekestsev, I.V. AU Lipman, P.W. AU Lowenstern, J.B. AU Miller, D.R. AU Dokuchaev, A.Y. PY 2004 IS 6 PB Geophysical Center of the Russian Academy of Sciences