RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 10, ES5001, doi:10.2205/2008ES000302, 2008
Figure 1. Scheme of the geological structure in the north of the Western Magnitogorsk
and Sakmara-Voznesenka zones (compiled using records by V. I. Kozlov, I. S. Anisimov,
V. V. Babkin, A. V. Zhdanov and others). 1 - terrigenous carbonate sediments
(C1);
2 - Zilair Formation (D3 -C1) - flyschoid clayey terrigenous sediments with
tuffaceous admixture; 3 - Bugodak Formation (D3fm) - tuffs,
tuffites, andesites, basaltic andesites; 4-5 - Mukasovo Formation (D3f) and its
analogs: 4 - cherts, siliceous siltstones, 5 - grey- and red-colored sandstones and
siltstones; 6 - limestones (D2 \v{z}v); 7 - Ulutau
Formation and analogs of the Yarlykapovo
Horizon, nonsubdivided (D2 \v{z}v) - basalts, rhyolite tuffs, cherts, jaspers, manganese ores;
8 - Irendyk and Karamalytash formations, pooled and their analogs (D1-2) - intermediate
and basic volcanites; 9 - Mansurovo sequence (D1e) - tuffaceous terrigenous sediments
bearing mixtite and chert beds; 10 - terrigenous siliceous and basaltic siliceous
sequences (S-D1); 11 - limestones (S2 -D1); 12 - Sakmara Formation
(S1-2) - carbonaceous siliceous shales and siltstones; 13 - Guberlya Formation
(O2-3) - basalts, tuffites, cherts, tuffs of mixed composition; 14-17 - Polyakovka Formation
(O1-3) in the nappes' section: 14 - first (lower) nappe - basalts, cherts
(O2l-O3k1),
15 - second nappe - basalts and cherts (O2l-O3k1),
16 - third nappe - basalts and cherts
(O1a-O3k-a\v{s}), 17 - fourth nappe - basalts, red cherts, specular schists
(O1a-O2l2);
18 - meta-arkoses R3?; 19 - Balbukovka complex of alkalic granitoids
(PZ3); 20 - gabbro-diorites (D1); 21 - dunite-wehrlite-clinopyroxenite
complexes; 22 - peridotites (lherzolites) of the Nurali
(on the north) and Tatlambet (on the south) massifs; 23 - serpentinite melange; 24 - fault
deformations; 25 - findings of paleontological remains, their numbers and age.
The inset map shows rock complexes in the South Urals
(after Savel'ev et al. [1998], simplified) and location
of the studied areas
(Figures 1, 5, 7, and 8, Baiguskarovo area):
1 - East European platform margin; 2 - Late Devonian-Early Carboniferous
graywackes (Zilair series): 3 - ophiolitic massifs and serpentinite melanges;
4 - Ordovician and Devonian complexes of accretionary prisms and island arcs
(SV - Sakmara-Voznesenka, M - Magnitogorsk, S - Sakmara, T - Tagil zones);
5 - Late Devonian and Carboniferous suprasubduction and riftogenic volcanogenic and
carbonate complexes; 6-7 - East Uralian zone: 6 - pre-Paleozoic and Early Paleozoic
metamorphic complexes, 7 - terrigenous covers, riftogenic volcanic complexes;
8 - Late Paleozoic granitoids of the Dzhabyk massif; 9 - Major Uralian Fault.

Citation: Dubinina, S. V., and A. V. Ryazantsev (2008), Conodont stratigraphy and correlation of the Ordovician volcanogenic and volcanogenic sedimentary sequences in the South Urals, Russ. J. Earth Sci., 10, ES5001, doi:10.2205/2008ES000302.
Copyright 2008 by the Russian Journal of Earth Sciences
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