fig04.htm

Figure 4. Periodicity of the largest ("great") glaciations and correlation of glacial periods to the intensities of some tectonic, volcanic, and metamorphic processes [Chumakov, 2001a]. Geologic time scale, modified after [Harland et al., 2001a]. Intensity of tectonic deformations, epochs (phases) of tectogenesis, granitization, metamorphism, development of ophiolites and calc-alkaline volcanites in the C-Cm (after [Khain and Seslavinsky, 1994]), mantle-plume and suprasubduction magmatisms in the Q-P (after [Dobretsov, 1999]). Epochs (phases) of tectogenesis: ATT - Attic, PYR - Pyrenean, LAR - Laramian, AUS - Austrian, LCIM - Late Cimmerian, ECIM - Early Cimmerian, PFA - Pfalzian, SAAL - Saalian, AST - Asturian, SUD - Sudetic, BRET - Bretonian, ACAD - Acadian, ARD - Ardennian, TAC - Taconian, SAL - Salairian, PAF - Pan-African. Glaciations: Solid horizontal lines, glacial epochs (glacioepochs) and their ages. The length of the lines is proportionate to the maximum spread of glaciations in a given epoch (in the Phanerozoic, to paleolatitudes, and in the Precambrian, to the number of continents). Line outlining glacioepochs shows glacial periods (glacioperiods). MC - Mesozoic cooling (modified after [Chumakov, 2001a]).


This document was generated by TeXWeb (Win32, v.1.3) on August 12, 2002.