RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 7, ES6003, doi:10.2205/2005ES000183, 2005

2005ES000183-fig02.html
Figure 2. Correlation of Late Precambrian geologic bodies in the Sayany-Baikal fold system (SBFS). Microfossil localities and their ecobiological interpretation. a - general chronological scale; b - regional horizons (series) of SBFS: Md - Medvezhevka; Bl - Ballaganakh; Dl - Dal'netaiga; Zn - Zhuya; Jd - Judoma. (1-6) microfossil ecobiological groups (explanations see below); (7) conglomerates and breccia-conglomerates; (8) gravelstones and polymictic, arkose-graywacke sandstones; (9) quartz sandstones; (10) siltstones; (11) argillites, silty argillites; (12) carbon-bearing argillites and silty argillites, sign of carbonaceous sediments; (13) limestones, sandy limestones, interbedded limestones and silty argillites; (14) dolomites, sandy dolomites, interbedded dolomites and silty argillites; (15) dolomitic limestones, calcareous and silty argillitic dolomites; (16) marls; (17) carbonates bearing stromatolites and microphytoliths; (18) granite, plagiogranite; (19) acidic volcanic rocks; (20) intermediate volcanic rocks; (21) basic volcanic rocks; (22) tuffs and tuffites; (23) boundaries of regional horizons; (24) isotopic age: 743 pm 47 (Sm-Nd isochron) [Sklyarov et al., 2003]; 670 pm 65 (Rb-Sr isochron) [Buldygerov et al., 1988]; 663 pm 3, 704 pm 71, 812 pm 19, 823 pm 2, 825 pm 3 (Sm-Nd isochron and U-Pb by zircon) [Rytsk et al., 1999, 2001]; 711 pm 6, 727 pm 18 (U-Pb by zircon) [Rytsk et al., 2000]. Formations and sequences: ai - Aiktin; ain - Ayanka; ais - Aisa; an - Anangra; as - Asektamur; au - Aunakit; avg - Avgol; avk - Avkit; bd - Bodaibokan; bg - Bugarikhta; br - Barakun; bz - Buzhuikhta; cn - Chencha; cs - Chaya; dg - Dogalda; dl - Delyun; dlg - Dzhalagun; dn - Dannaya; dz - Dzhemkukan; gl - Goloustnaya; gr - Gramdakan; hl - Kholodnaya; hm - Khomolkha; hr - Kharlukhtakh; ht - Khoty; hv - Khaiverga; il - IligirŐ; im - Imnyakh; ip - Ipsit; it - Itykit; jk - Yakor; jkr - Yakrin; jng - Yanguda; kc - Kachergat; kk - Kooktin; kl - Kalancha; kln - Kelyana; kr - Kurtun; md - Medvezhevka; mm - Mamakan; mr - Mariinskii; mrn - Marnin; ng - Nugan; nh - Nokhtuisk; nk - Nikol'skoe; okt - Oktolokit; old - Oldakit; on - Ondoko; pdr - Padrokan; prv - Protivodavan; pm - Pravomam; rs - Rassokha; sd - Sidel'tin; shn - Shangulezh; sm - Shumnyi; sn - Synnyr (Inyaptuk volcanic complex); st - Stoibishchnaya; tg - Tagul; tk - Tukolamii; tn - Tinnaya; ts - Tyya; ud - Uda; ug - Ugakhan; ul - Uluntuiskaya; ur - Urin; urh - Uryakh; us - Usol'e; ush - Ushakovo; ust - Ust'tagul; uur - Ust'uryakh; vc - Vacha; vd - Vodorazdel'naya; vl - Valyukhta; zl - Zolotoi; zr - Zherba; pr - Primorskii granite complex. Ecobiological groups (symbols 1-6): (1) anaerobic, sulfate-reducing, and other (?) bacteria, marine benthos from different depths; (2) aerobic sulfur bacteria, shallow marine benthos; (3) dinoflagellates or aerobic prostecobacteria, facultative marine plankton; (4) cyanobacterial, mainly littoral assemblages; (5) acanthomorphic and other eucaryotic algae, mainly plankton; (6) green algae, facultative marine plankton. Microfossil species and genera referred to ecobiological groups are shown on Figure 5.

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Citation: Stanevich, A. M., V. K. Nemerov, Yu. K. Sovetov, E. N. Chatta, A. M. Mazukabzov, V. I.  Perelyaev, and T. A. Kornilova (2005), Precambrian microfossil-characterized biotopes from the southern margin of the Siberian craton, Russ. J. Earth Sci., 7, ES6003, doi:10.2205/2005ES000183.

Copyright 2005 by the Russian Journal of Earth Sciences
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