Figure 1. Correlation of glacial horizons and other climatic indicators in key sections of the Vendian. The names of supergroups, groups, and subgroups are printed in capital letters, and those of formations and smaller stratigraphic units are lowercased. V_I, V_II, and V_III denote the "Early,'' "Middle,'' and "Late Vendian''-informal units used in this paper. 1 - glacial deposits; 2 - inferred glacial deposits; 3 - cap carbonates; 4 - carbonate platforms; 5 - redbed carbonates; 6 - black shales; 7 - redbed carbonate shales; 8 - tuffs and tuffites; 9-(a) - ignimbrites, (b) - gabbro; 10-(a) - gypsum and anhydrite members and beds, (b) - gypsum inclusions and pseudomorphs; 11-(a) - halite, (b) - pseudomorphs after halite; 12 - stromatolites; 13 - glacialy abraded bed; 14 - dropstones; 15 - glacial pavements; 16 - glacialy abraded stones; 17 - erratic stones; 18 - varves; 19 - glacial orientation of stones; 20 - pseudomorphs after ice wedges and frost cracks; 21 - cryoturbation; 22 - glacial dislocations; 23 - iron ores and iron-rich rocks; 24 - assemblages of spheromorphic microfossils; 25 - assemblages of acanthomorphic microfossils; 26 - ichnofossils: (1) - assemblage of Planolites, etc., (2) - assemblage of Phycodes etc., (3) - assemblage of Rusophycus, etc.; 27 - pre-Ediacaran multicellular organisms; 28 - Ediacaran faunal assemblages; 29 - metaphytes; 30 - Claudina; 31 - Sabellidites; 32 - Platisolenites; 33 - archaeocyathids; 34 - sponge spicules; 35 - small-shelled faunas; 36 - protoconodonts; 37 - trilobites; 38 - Salterella; 39-44 - isotope date: 39 - U/Pb from zircon; 40 - Rb/Sr from whole rocks; 41 - U/Pb other minerals; 42 - Pb/Pb on carbonates; 43 - Lu/Hf on phosphorites; 44 - datings from adjacent areas; 45 - conformable contacts; 46 - unconformable contacts; 47 - angular unconformities; 48 - observed hiatuses. References: (1, 2) - [Narbonne and Aitken, 1995; Walter et al., 2000]. (3, 4, 5) - [{\it Myrow,} 1995; Myrow and Kaufman, 1999; {\it Narbonne and Gehling,} 2003\link{75}]. (6, 7) - [Chumakov, 1978b; Harland et al., 1993]. (8, 9) - [Vidal, 1981; Gorokhov et al., 2001]. (10, 11) - [Aksenov, 1990; Vidal and Moczydlowska, 1995; Martin et al., 2000]. (12, 13) - [Bekker, 1992; Chumakov, 1998]. (14, 15) - [Kiselev and Korolev, 1981; Hambrey et al., 1981]. (16) - [Yin and Guan,} 1999]. (17, 18) - [Wang, et al., 1998; Zhang et al., 1998; {\it Barfod et al.,} 2002\link{7}]. (19, 20) - [Brasier and McCarron, 2000; Leather et al., 2002]. (21, 20) - [Tiwari and Knoll, 1994; Tiwari, 1999]. (23, 24) - [Preiss, 2000; Walter et al., 2000; {\it Calver,} 2000]. (25, 26) - [Germs, 1995; Walter et al., 2000\link{101}]. (27) - [Trompette, 1994, 1997]. (28) - [Alvarenga and Trompette, 1988, 1992].