Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-29T16:59:21.592Z Has data issue: false hasContentIssue false
  • English
  • Français

Assemblages of calcareous algae near the Precambrian/Cambrian boundary in Siberia and Mongolia

Published online by Cambridge University Press:  01 May 2009

Robert Riding  and
Larisa Voronova
Robert Riding
Affiliation:
Department of Geology, University College, Cardiff CF1 1XL, U.K.
Larisa Voronova
Affiliation:
Palaeontological Institute, Academy of Sciences, ul. Profsoyuznaya 113, Moscow 117321, U.S.S.R.
Get access Rights & Permissions [Opens in a new window]

Abstract

Calcareous algae make their first appearance near the base of the Tommotian. The oldest confirmed occurrences are of ?Gemma, Obruchevella and Renalcis in the Nemakit-Daldyn Horizon and late Yudomian of Siberia. A little higher in the sequence, in the Aldanocyathus sunnaginicus Zone of the earliest Tommotian, Angulocellularia, Bajanophyton, Batenevia, Botomaella, Girvanella, Hedstroemia, Korilophyton, Proaulopora, Subtifloria, and Tarthinia appear. Immediately above this, in the Dokidocyathus regularis Zone of the middle Tommotian, Chabakovia appears with the epiphytacean genera Epiphyton, Gordonophyton and Tubomorphophyton. There are only minor subsequent additions to this flora before the end of the Atdabanian. Kordephyton appears in the Dokidocyathus lenaicus Zone of the late Tommotian and Razumovskia in the early Atdabanian.

These fossils constitute three calcareous algae assemblages (CAA 1, 2, 3) characteristic of the Nemakit-Daldyn Horizon/late Yudomian, early Tommotian, and middle Tommotian/Atdabanian respectively. Most of the genera are long-ranging, but their rapid appearance and diversification near the base of the Tommotian repesents an important event in the history of calcareous algae and augments faunal data concerning evolution and biostratigraphy near the Precambrian/Cambrian boundary.

Type
Articles
Information
Geological Magazine , Volume 121 , Issue 3 , May 1984 , pp. 205 - 210
Copyright
Copyright © Cambridge University Press 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Drosdova, N. A. 1980. Algae in Lower Cambrian organic mounds of west Mongolia. Joint Soviet-Mongolian Palaeontological Expedition, Transaction 10, ‘Nauka’, Moscow, 140 pp (in Russian).Google Scholar
Kolosov, P. N. 1966. New species of Precambrian algae from the basin of the River Olekmi. Report of the Academy of Sciences of the U.S.S.R. 171 (4), 978–80 (in Russian).Google Scholar
Kolosov, P. N. 1977. The oldest oil and gas bearing deposits of the south-eastern Siberian Platform. Academy of Sciences of the U.S.S.R., Siberian Branch, Yakutsk Section, Geological Institute. ‘Nauka’, Novosibirsk, 90 pp (in Russian).Google Scholar
Korde, K. B. 1955. Algae from Cambrian deposits of the rivers Lena, Botoma and Amga. Academy of Sciences of the U.S.S.R. Transactions of the Palaeontological Institute 56, 79–91 (in Russian).Google Scholar
Korde, K. B. 1961. Cambrian algae from the south-eastern Siberian Platform. Academy of Sciences of the U.S.S.R. Transactions of the Palaeontological Institute 89, 144 pp (in Russian).Google Scholar
Luchinina, V. A. 1969. Renalcis polymorphus Maslov from the Yudomian complex of the River Sukharikha. In Biostratigraphy and Palaeontology of the Lower Cambrian of Siberia and the Far East, pp. 184–5. Academy of Sciences of the U.S.S.R., Siberian Section, Institute of Geology and Geophysics, ‘Nauka’, Moscow (in Russian).Google Scholar
Luchinina, V. A. 1975. Palaeoalgological characteristics of the Lower Cambrian of the Siberian Platform. Academy of Sciences of the U.S.S.R., Siberian Branch, Institute of Geology and Geophysics Issue 216, ‘Nauka’, Novosibirsk, 98 pp (in Russian).Google Scholar
Meshkova, N. P., Nikolaeva, I. V., Kulikov, Yu. P., Zhuravleva, I. T., Luchinina, V. A., Musatov, D. I. & Sidoras, S. D. 1976. Stratigraphy of Precambrian–Cambrian boundary deposits of the northern part of the Anabar Massif. In Stratigraphy and Palaeontology of the Lower and Middle Cambrian of the U.S.S.R. Academy of Sciences of the U.S.S.R., Siberian Section, Institute of Geology and Geophysics, Transaction 269, 3–22 (in Russian).Google Scholar
Reitlinger, E. A. 1948. Cambrian foraminifers of Yakutia. Bulletin of the Moscow Society of Naturalist Researchers 23 (2) (in Russian).Google Scholar
Reitlinger, E. A. 1959. Atlas of microscopic organic remains and problematica from Siberia's oldest deposits. Academy of Sciences of the U.S.S.R., Transactions of the Geological Institute of Moscow 25, 62 pp (in Russian).Google Scholar
Riding, R. & Voronova, L. 1982. Calcified cyanophytes and the Precambrian-Cambrian transition. Naturwissen-schaften 69, 498.CrossRefGoogle Scholar
Stepanova, M. V. & Luchinina, V. A. 1982. The lower boundary of the Cambrian based on calcareous algae. In Boundaries of the Principal Subdivisions of the Phanerozoic in Siberia. Collected Scientific Works. SNIIGGMS, Novosibirsk, pp. 39–46 (in Russian).Google Scholar
Voronin, Yu. I., Voronova, L. G., Grigoreva, N. V., Drosdova, N. A., Shegallo, E. A., Zhuravlev, A. Yu., Ragozina, A. L., Rozanov, A. Yu., Sayutina, T. A., Sisoev, V. A. & Fonin, V. D. 1982. The Precambrian–Cambrian boundary in geosynclinal areas (the reference section Salany-Gol, MPR). Joint Soviet-Mongolian Palaeontological Expedition, Transaction 18. ‘Nauka’, Moscow, 150 pp (in Russian).Google Scholar
Voronova, L. G. 1969. Algae. In The Tommotian Stage and the Cambrian Lower Boundary Problem, pp. 189–95. (Rozanov, A. Yu., Missarzhevskii, V. V., Volkova, N. A., Voronova, L. G., Krylov, I. N., Keller, B. M., Korolyuk, I. K., Lendzion, K., Michniak, R., Pykhova, N. G. & Sidorov, A. D.) Academy of Sciences of the U.S.S.R., Geological Institute, Transaction 206, ‘Nauka’, Moscow (in Russian). (English edition 1981, Amerind, New Delhi), pp. 221–7.Google Scholar
Voronova, L. G. 1976. Calcareous algae from the Precambrian-Cambrian boundary deposits of the Siberian Platform. In Palaeozoic Algae and Microphytolites (Voronova, L. G. & Radionova, E. P.), pp. 3–85, plates 1–19. Academy of Sciences of the U.S.S.R., Geological Institute, Transaction 294 (in Russian).Google Scholar
Voronova, L. G. & Missarzhevskii, V. V. 1969. Discoveries of algae and worm-tubes in the Precambrian–Cambrian boundary beds of the northern Siberian Platform. Academy of Sciences of the U.S.S.R., Reports 184 (1), 207–10 (in Russian).Google Scholar
Zhuravleva, I. T., Meshkova, N. P., Luchinina, V. A. & Kashina, L. N. 1982. Late Precambrian and early Cambrian biofacies of the Anabarian Sea. In Environment and Life in the Geological Past, Palaeolandscape and Biofacies, pp. 74–103. Academy of Sciences of the U.S.S.R., Siberian Section, Institute of Geology and Geophysics, Transaction 510. Novosibirsk (in Russian).Google Scholar