DOCSLIB.ORG

Kotlin Regional Stage in the South Urals D

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Kotlin Regional Stage in the South Urals D ISSN 1028334X, Doklady Earth Sciences, 2011, Vol. 440, Part 1, pp. 1222–1226. © Pleiades Publishing, Ltd., 2011. Original Russian Text © D.V. Grazhdankin, V.V. Marusin, J. Meert, M.T. Krupenin, A.V. Maslov, 2011, published in Doklady Akademii Nauk, 2011, Vol. 440, No. 2, pp. 201–206. GEOLOGY Kotlin Regional Stage in the South Urals D. V. Grazhdankina, V. V. Marusina, J. Meertb, M. T. Krupeninc, and Corresponding Member of the RAS A. V. Maslovc Received April 26, 2011 DOI: 10.1134/S1028334X11090170 According to the current tradition that has analogy with the Redkino Regional Stage [3, 4], we remained unchanged since 1977, the Upper Vendian propose to restrict the stratigraphic range of the Kotlin of the East European Craton is subdivided into three Regional Stage and match its lower boundary with the regional stages (horizons): Redkino, Kotlin, and marine flooding surface (mfs) that is traced across the Rovno. It is generally believed that the Redkino entire East European Craton (Fig. 2). This surface Regional Stage is characterized by casts and molds of transgressively overlies the Redkino and older strata softbodied organisms; the Kotlin, by diverse assem (locally, the crystal basement) on the southern slope of blages of carbonaceous compressions; the Rovno, by the Baltic Shield. In some sections (Valdai Borehole), the appearance of diverse ichnocoenoses [1]. It turned the Redkino shales preserve evidence of subaerial out that carbonaceous compressions also occur in the exposure in the form of kaolinite. We place the lower Redkino Regional Stage as a distinctive fossil assem Kotlin boundary in the base of a thin (4.7–7.6 m) unit blage [2, 3], whereas almost all casts and molds of soft of coarsegrained quartz and quartz–micaceous, bodied organisms in the Mezen Basin and South Urals rarely arkosic sandstones of the Gdov Formation. The are confined to a stratigraphic interval wedged main bulk of the Kotlin Regional Stage consists of between the Redkino and Kotlin and not represented gray, variegated, and redbrown clay and thinalter in the Moscow Basin [4]. It appears that the Redkino nating sandstones, siltstones, and shales [6]. lower boundary is older than previously thought: dur ing our fieldwork in 2009, we discovered volcanic tuffs The lower Kotlin boundary on the southeastern in the Perevalok Formation of the Sylvitsa Group in slope of Baltic Shield (southeastern White Sea area) is the Krutaya Gora section on the Us’va River (Central drawn at the base of the Erga Formation. In the sec Urals) that yielded a U–Pbzircon date of 567.2 ± tions along the Bol’shaya Torozhma and Zimn’yaya 3.9 Ma (Fig. 1). Considering a Rb–Sr (Cpx + bulk) Zolotitsa rivers, the lower Erga Formation comprises date of 608 ± 3 Ma for the explosive picritic breccia interstratified variegated wavebedded sandstones, intruded into the Kernos Formation (which underlies siltstones, and shales of the highstand systems tract the Staropechny Formation of Redkino Regional (HSST) transgressively overlying various parts of the Stage in the Central Urals) and a Sm–Nd (Cpx + Zimnegory Formation. The base of this unit is marked bulk) date of 569 ± 42 Ma for picrobasalts, trachyba by a marine flooding surface and packages (up to 2 m) salts, and trachyandesites of the Dvorets volcanogenic of wavebedded quartz sandstone with conglomerate complex of Upper Kernos Formation [5], the Redkino lenses. In the sections of Zimnie Gory, the lower Erga lower boundary age can be placed as 570–600 Ma. Formation consists of a cyclic stratification of units of dark gray thinbedded shales, packages of yellowish Fossils have been rather freely used to subdivide the gray sandstones, and intervals of alternating siltstones Upper Vendian into the regional stages, which inevita and shales. This succession (reaching 30 m in thick bly led to inflation of the paleontological characteris ness) represents a gentle incised valley fill constrained tic and correlation of heterochronous deposits. By by a marine regression surface (mrs) from below and a marine flooding surface from above and is interpreted as a transgressive system tract (TST) of the Erga a Trofimuk Institute of Petroleum Geology and Geophysics, sequence. The overlying unit of variegated interstrati Siberian Branch, Russian Academy of Sciences, fied wavebedded sandstones, siltstones, and clays is pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia coeval with a similar unit at the base of Erga Forma b University of Florida, Gainsville, FL 326112002 USA tion in the adjacent sections. The sharp facies change c Zavaritskii Institute of Geology and Geochemistry, allows direct tracing of the marine flooding surface at Ural Branch, Russian Academy of Sciences, the base of the highstand system tract of Erga sequence Pochtovyi per. 7, Yekaterinburg, 620075 Russia in outcrops and boreholes. We propose to match this email: [email protected], [email protected], surface with the lower boundary of the Kotlin [email protected] Regional Stage in the southeastern White Sea area. 1222 KOTLIN REGIONAL STAGE IN THE SOUTH URALS 1223 According to this correlation, the transgressive sys 206Pb/238U tems tract of Erga Formation with a diverse assem (а) blage of casts and molds of softbodied organisms is not part of the Kotlin Regional Stage. In the Moscow Basin, the marine flooding surface is traced at the base of quartz and arkosic sandstones of 580 the Pereslavl’ beds of Lubim Formation [7]. In the 0.094 Central Urals, we place this surface at the lower boundary of dark gray and variegated siltstones and shales of the Konovalovka Member of the Chernoka men Formation that overlies various parts of the Cher nokamen Formation. The marine flooding surface is 540 difficult to trace in the Mezen Basin characterized by Sample 090315 567.2 ± 3.9 Ma the highest subsidence rates on the craton. We draw 0.086 MSWD = 1.14 the lower Kotlin boundary by the appearance of varie N = 16 gated rocks in the “Mezen Formation.” We therefore propose to establish the Kotlin Regional Stage as an equivalent of the highstand sys 0.67 0.690.71 0.73 0.75 0.77 0.79 0.81 0.83 tems tract of the Erga sequence bounded by the (b) marine flooding surface below and the marine regres 590 sion surface above. In order to preserve the correlation function of the Kotlin for the Upper Vendian stratigra phy, we suggest exclusion from the Kotlin Regional 570 Stage of the Padun Formation of Mezen Basin (and 0.092 the lithologically similar Reshm Formation of Mos cow Basin) that contains trace fossils Diplocraterion of 550 the Lontova Regional Stage [8]. The Kotlin Regional Stage is characterized by a specific assemblage of fossil softbodied organisms. 530 The highstand systems tract of the Erga sequence (southeastern White Sea area, Mezen Basin, western 0.084 Sample 08259 510 548.2 ± 7.6 Ma slope of the Central Urals) yielded fossil arumberi MSWD = 1.6 amorph organisms. Threedimensional casts of N = 8 rangeomorphs and psammocorals, casts and molds of dickinsoniomorphs, bilateromorphs, and tribrachio 0.62 0.660.70 0.74 0.78 0.82 morphs found in the upper part of Winter Mountains 207Pb/235U (Zimnie Gory) sections, as well as fossil dickinsonio morphs, petalonamae, and rangeomorphs in Konov Fig. 1. U–Pbzircon date of volcanic tuffs from Perevalok alovka and Krutikha members of the Chernokamen Formation of the Sylvitsa Group, Central Urals (a), Formation in the Sylvitsa Rivers sections of the Cen and from the Zigan Formation of the Asha Group, South tral Urals all have the Kotlin age. Strata cropping out Urals (b). in the middle reaches of the Onega River on the south eastern margin of the Vetrenyi Poyas Ranges and tary origin. Apart from Psammichnites, the ichno yielding threedimensional casts of petalonamae, tri coenoses also include relatively large vertical burrows brachiomorphs, and rangeomorphs are also related to of sedentary polypoid organisms Bergaueria and the Kotlin Regional Stage [9]. Astropolichnus and vertical burrows of wormlike The lower part of the highstand systems tract of the organisms Scolithos, as well as trace fossils from the Erga sequence is characterized by trace fossils, of underlying strata: meandering horizontal meniscate which the most important is Psammichnites found in traces Nenoxites, small epirelief pairs of ridges Archae the lower Erga Formation in the coastal cliffs of the onassa, meandering horizontal traces Planolites, and Winter Mountains (southeastern White Sea area). It is small Bergaueria. preserved as a pair of ridges (hyporelief and epirelief) formed as a result of burrow collapse that was made The paleontological characteristic of the Zigan within the sediment by bilaterian organisms. These Formation of Asha Group (western slope of South organisms moved in the horizontal plane and had a Urals) is also very interesting. Based on the discovery vertical snorkel for collecting detritus from the surface. of casts and molds of softbodied organisms, the strata When crosscutting of Psammichnites is observed, an are correlated with the Redkino Regional Stage [10]. older trace is not obliterated but instead is superim Sedimentological analyses of Zigan sections demon posed by a successive trace implying an intrasedimen strate that this formation is part of a highstand systems DOKLADY EARTH SCIENCES Vol. 440 Part 1 2011 1224 GRAZHDANKIN et al. Podolia 504 zbr V Moscow Basin 483 Southeastern Central Urals Redkino khm White 1700 IV borehole Sea area oku 405 1205 757 stu V V res kru V mrs South Urals pad Ust’Katav zha 1365 623 dan 525 III lub III III zig 548.2 ± 7.6 III nag erg che 154 mfs 1576 498 1110 445 mfs nep1 yar zim 553 I II 555.3 ± 0.3 gav II II 1714 II mog mrs ver bas 210 gru mrs 558 ± 1 I lya 557 ± 13 500 ury I per I 1 2 3 4 567.2 ± 3.9 bak 5 6 7 8 9 10 sta mrs 608 ± 3; 569 ± 42 Fig.
Load more

Recommended publications
  • Introduction to the 2008 Circum-Arctic Resource Appraisal (CARA) Professional Paper
    Introduction to the 2008 Circum-Arctic Resource Appraisal (CARA) Professional Paper Chapter A of The 2008 Circum-Arctic Resource Appraisal Professional Paper 1824 U.S. Department of the Interior U.S. Geological Survey Cover. View to the east of the Lisburne well during active drilling in July 1979, Ivotuk Hills, northern Alaska. U.S. Geological Survey photo by Thomas Moore. Introduction to the 2008 Circum-Arctic Resource Appraisal (CARA) Professional Paper By Donald L. Gautier and Thomas E. Moore Chapter A of The 2008 Circum-Arctic Resource Appraisal Edited by T.E. Moore and D.L. Gautier Professional Paper 1824 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior RYAN K. ZINKE, Secretary U.S. Geological Survey William H. Werkheiser, Acting Director U.S. Geological Survey, Reston, Virginia: 2017 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Suggested citation: Gautier, D.L., and Moore, T.E., 2017, Introduction to the 2008 Circum-Arctic Resource Appraisal (CARA) professional paper, chap.
    [Show full text]
  • Eunaseis: a Seismic Model for Moho and Crustal Structure in Europe, Greenland, and the North Atlantic Region
    EUNAseis a seismic model for Moho and crustal structure in Europe, Greenland, and the North Atlantic region Artemieva, Irina; Thybo, Hans Published in: Tectonophysics DOI: 10.1016/j.tecto.2013.08.004 Publication date: 2013 Document version Publisher's PDF, also known as Version of record Citation for published version (APA): Artemieva, I., & Thybo, H. (2013). EUNAseis: a seismic model for Moho and crustal structure in Europe, Greenland, and the North Atlantic region. Tectonophysics, 609, 97-153. https://doi.org/10.1016/j.tecto.2013.08.004 Download date: 04. Oct. 2021 Tectonophysics 609 (2013) 97–153 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Review Article EUNAseis: A seismic model for Moho and crustal structure in Europe, Greenland, and the North Atlantic region☆ Irina M. Artemieva ⁎, Hans Thybo IGN, University of Copenhagen, Denmark article info abstract Article history: We present a new digital crustal model for Moho depth and crustal structure in Europe, Greenland, Iceland, Received 27 November 2012 Svalbard, European Arctic shelf, and the North Atlantic Ocean (72W–62E, 30N–84N). Our compilation is based Received in revised form 18 July 2013 on digitization of original seismic profiles and Receiver Functions from ca. 650 publications which provides a Accepted 4 August 2013 dense regional data coverage. Exclusion of non-seismic data allows application of the database to potential Available online 15 August 2013 field modeling. EUNAseis model includes Vp velocity and thickness of five crustal layers, including the sedimen- tary cover, and Pn velocity. For each parameter we discuss uncertainties associated with theoretical limitations, Keywords: Moho regional data quality, and interpolation.
    [Show full text]
  • A Seismic Model for Moho and Crustal Structure in Europe, Greenland, and the North Atlantic Region☆
    Tectonophysics 609 (2013) 97–153 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Review Article EUNAseis: A seismic model for Moho and crustal structure in Europe, Greenland, and the North Atlantic region☆ Irina M. Artemieva ⁎, Hans Thybo IGN, University of Copenhagen, Denmark article info abstract Article history: We present a new digital crustal model for Moho depth and crustal structure in Europe, Greenland, Iceland, Received 27 November 2012 Svalbard, European Arctic shelf, and the North Atlantic Ocean (72W–62E, 30N–84N). Our compilation is based Received in revised form 18 July 2013 on digitization of original seismic profiles and Receiver Functions from ca. 650 publications which provides a Accepted 4 August 2013 dense regional data coverage. Exclusion of non-seismic data allows application of the database to potential Available online 15 August 2013 field modeling. EUNAseis model includes Vp velocity and thickness of five crustal layers, including the sedimen- tary cover, and Pn velocity. For each parameter we discuss uncertainties associated with theoretical limitations, Keywords: Moho regional data quality, and interpolation. Crustal thickness By analyzing regional trends in crustal structure and links to tectonic evolution illustrated by a new tectonic map, Crystalline crust we conclude that: (1) Each tectonic setting shows significant variation in depth to Moho and crustal structure, Sedimentary cover essentially controlled by the age of latest tectono-thermal processes; (2) Published global averages of crustal pa- Pn velocity rameters are outside of observed ranges for any tectonic setting in Europe; (3) Variation of Vp with depth in the Crustal evolution sedimentary cover does not follow commonly accepted trends; (4) The thickness ratio between upper-middle (Vp b 6.8 km/s) and lower (Vp N 6.8 km/s) crystalline crust is indicative of crustal origin: oceanic, transitional, platform, or extended crust; (5) Continental rifting generally thins the upper-middle crust significantly without changing Vp.
    [Show full text]
  • Geology and Assessment of Undiscovered Oil and Gas Resources of the Laptev Sea Shelf Province, 2008
    Geology and Assessment of Undiscovered Oil and Gas Resources of the Laptev Sea Shelf Province, 2008 Chapter W of The 2008 Circum-Arctic Resource Appraisal Professional Paper 1824 U.S. Department of the Interior U.S. Geological Survey COVER Eocene strata along the north side of Van Keulenfjorden, Svalbard, include basin-floor fan, marine slope, and deltaic to fluvial depositional facies. The age and facies of these strata are similar to Tertiary strata beneath the continental shelves of Arctic Eurasia, thus providing an analog for evaluating elements of those petroleum systems. Relief from sea level to top of upper bluff is approximately 1,500 feet. Photograph by David Houseknecht. Geology and Assessment of Undiscovered Oil and Gas Resources of the Laptev Sea Shelf Province, 2008 By Timothy R. Klett and Janet K. Pitman Chapter W of The 2008 Circum-Arctic Resource Appraisal Edited by T.E. Moore and D.L. Gautier Professional Paper 1824 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior RYAN K. ZINKE, Secretary U.S. Geological Survey William H. Werkheiser, Acting Director U.S. Geological Survey, Reston, Virginia: 2017 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S.
    [Show full text]
  • Late Precambrian to Triassic History of the East
    VU Research Portal Late Precambrian to Triassic history of the East European craton: dynamics of sedimentary basin evolution Nikishin, A.M.; Ziegler, P.A.; Stephenson, R.A.; Cloetingh, S.A.P.L.; Furne, A.V.; Fokin, P.A.; Ershov, A.V.; Boloytov, S.N.; Korotaev, M.V.; Alekseev, A.S.; Gorbachev, V.I.; Shipilov, E.V.; Lankreijer, A.C.; Bembinova, E.Y.; Shalimov, I.V. published in Default journal 1996 DOI (link to publisher) 10.1016/S0040-1951(96)00228-4 document version Publisher's PDF, also known as Version of record Link to publication in VU Research Portal citation for published version (APA) Nikishin, A. M., Ziegler, P. A., Stephenson, R. A., Cloetingh, S. A. P. L., Furne, A. V., Fokin, P. A., Ershov, A. V., Boloytov, S. N., Korotaev, M. V., Alekseev, A. S., Gorbachev, V. I., Shipilov, E. V., Lankreijer, A. C., Bembinova, E. Y., & Shalimov, I. V. (1996). Late Precambrian to Triassic history of the East European craton: dynamics of sedimentary basin evolution. Default journal. https://doi.org/10.1016/S0040-1951(96)00228-4 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.
    [Show full text]
  • Note: Page Numbers in Italic, E.G
    Index Note: page numbers in italic, e.g. 164, refer to figures. Page numbers in bold, e.g. 72, signify entries in tables. acritarchs, Late Cambrian age constraints on Kolguev Island 159 Bothnia, Gulf of 170 Agma 39 Botniahalvoya 208, 209 Ai Formation 19-20 Breibogen-Bockfjorden Fault 192, 208 Aldan, River 234 Brennevinst]orden 193 Aldan shield 234 Brennevinsfjorden Group 192 Amderma 2, 20 Bugrino 160 Anabar shield 234 Burzyan 30 Andr6eland 192 Burzyan Group 19-21 Andr6eland-Dicksonland Graben 192, 195-196 Buton Formation 26 Andr6eneset 208 Bystrino Group 29 Angara, River 234 Bystrynskaya Group 9-12, 12 Angara Block 234 Aral Sea 146 Caledonian Suture 59 Arkhangel'sk 2, 39, 146 Caledonides 2 palaeogeographic/palaeotectonic sketch map 49 comparison with Laurentian margin 197-200, 198 Arsha Formation 23 relationship with Timanides 201 Atomt]ella Antiform 194-195, 194, 209 western Baltoscandian basins 178, 178 Austfonna 209 type I basins 178-181,179 Avzyan Formation 22 type II basins 181 - 182 type III basins 182-183 Bad'yashorskaya Formation 148 Celsiusberget Group 193 Baikal, Lake 234 Central Timan Fault (CTF) 6, 48, 48, 60, 170 Baikalides 1,233 palaeogeographic/palaeotectonic sketch map 49 Baikibash Formation 24 Chaichiy Island 62 Bakal Formation 20-21 Chelyabinsk 2 Bakeevo Formation 23 Chelyuskin ophiolite belt 240-241 Balto-Timanian triple junction (BTTJ) 185 Chernaya, River 70 Bangenhuken Complex 194 Chernyi Kamen Formation 26 Barents Sea 2, 6, 59 Cheshskaya Bay 6, 8, 60, 70 Timanian and Caledonian trends 53-54 Chetlas Group 28 regional
    [Show full text]
  • 100Years of Seismic Research on the Moho
    Tectonophysics 609 (2013) 9–44 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Review Article 100 years of seismic research on the Moho Claus Prodehl a, Brian Kennett b, Irina M. Artemieva c, Hans Thybo c,⁎ a Geophysical Institute, University of Karlsruhe, Karlsruhe Institute for Technology, Hertzstr. 16, D76167 Karlsruhe, Germany b Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia c Department of Geography and Geology, University of Copenhagen, Oester Voldgade 10, DK-1350 Copenhagen K, Denmark article info abstract Article history: The detection of a seismic boundary, the “Moho”, between the outermost shell of the Earth, the Earth's crust, and Received 6 June 2012 the Earth's mantle by A. Mohorovičić was the consequence of increased insight into the propagation of seismic Received in revised form 27 May 2013 waves caused by earthquakes. This short history of seismic research on the Moho is primarily based on the com- Accepted 29 May 2013 prehensive overview of the worldwide history of seismological studies of the Earth's crust using controlled Available online 12 June 2013 sources from 1850 to 2005, by Prodehl and Mooney (2012). Though the art of applying explosions, so-called “ar- tificial events”, as energy sources for studies of the uppermost crustal layers began in the early 1900s, its effective Keywords: Moho use for studying the entire crust only began at the end of World War II. From 1945 onwards, controlled-source Crust seismology has been the major approach to study details of the crust and underlying crust–mantle boundary, Lithosphere the Moho.
    [Show full text]
  • Potencial De Correlación Estratigráfica De Los Paleopasciquínidos Del Ediacárico
    Estudios Geológicos julio-diciembre 2019, 75(2), e102 ISSN-L: 0367-0449 https://doi.org/10.3989/egeol.43588.557 Stratigraphic correlation potential of the Ediacaran palaeopascichnids Potencial de correlación estratigráfica de los paleopasciquínidos del Ediacárico A.V. Kolesnikov1,2,3 1Geological Institute, Russian Academy of Sciences, Pygevsky 7, Moscow 119017, Russia. Email: [email protected]; ORCID ID: https://orcid.org/0000-0003-1028-9082 2Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch Russian Academy of Sciences, prospekt Akademika Koptyuga 3, Novosibirsk 630090, Russia 3Moscow State Pedagogical University, Faculty of Geography, Kibalchicha str. 16, Moscow 129626, Russia ABSTRACT For more than forty years, palaeopascichnids represented an enigmatic group of macroscopic fossils, which are characterised by substantial differences in preservation leading to no consistent diagnosis for these organ- isms. Numerically abundant palaeopascichnid fossils are globally distributed in Ediacaran sequences of the East European Platform, Avalonia, South China, Siberia and Australia. In light of new perspective to reanimate the ‘Vendian’ as a formal upper series of the Ediacaran System, Palaeopascichnida is probably the only Ediacaran fos- sil group whose stratigraphic range spans almost the entire ‘Vendian Series’. Furthermore, it has been considered that palaeopascichnids are among the oldest known macro organisms with an agglutinated skeleton; its presence puts emphasis on this group in terms of Ediacaran biostratigraphy and geological correlation and paves the way for the reexamination of other skeletal palaeopascichnid-like fossils. Keywords: Orbisiana; Palaeopascichnus; Yelovichnus; Palaeopascichnida; Ediacaran; Vendian. RESUMEN Durante más de cuarenta años, los paleopasciquínidos han representado un grupo enigmático de fósiles macroscópicos, caracterizados por diferencias sustanciales en la conservación, lo que no conduce a un diag- nóstico consistente de estos organismos.
    [Show full text]
  • At Freiberg University !
    Workshop & IGCP 469 Central European Meeting “FREIBERG 2004” Dept. of Palaeontology, Geological Institute, Freiberg University October, 9 - 11, 2004 _______________________________________________________________ "Environmental reconstruction and stratigraphy in the Palaeozoic" workshop in honour of the 125th obit of Bernhard von Cotta & "Late Westphalian terrestrial biotas and palaeoenvironments of the Variscan foreland and adjacent intramontane basins" 2004 Central European Meeting of IGCP 469 ▬▬▬ October, 9 – 11, 2004 ▬▬▬ Workshop & IGCP 469 Central European Meeting “FREIBERG 2004” Dept. of Palaeontology, Geological Institute, Freiberg University October, 9 - 11, 2004 _______________________________________________________________ BERNHARD VON COTTA Bernhard von Cotta, the famous German geologist, was born in a foresters lodge near Eisenach, on the 24th of October 1808. He was educated at Dresden, Tharandt, Freiberg and Heidelberg. From 1842 till 1874 he held the professorship of geology at the Bergakademie Freiberg ("mining academy"). Botany at first attracted him, and he was one of the earliest to use the microscope in determining the structure of fossil plants. Later on he gave his attention to practical geology, to the study of ore-deposits, of rocks and metamorphism. He was regarded as an excellent teacher. His classification and description of rocks (a Treatise on Lithology which was translated by P.H. Lawrence in 1866) was the first comprehensive work on the subject issued in the English language, and it gave great impetus to the study of rocks in Britain. Bernhard von Cotta died at Freiberg on the 14th of September 1879. Workshop & IGCP 469 Central European Meeting “FREIBERG 2004” Dept. of Palaeontology, Geological Institute, Freiberg University October, 9 - 11, 2004 _______________________________________________________________ organiser Prof. Dr.
    [Show full text]
  • Late Precambrian to Triassic History of the East European Craton: Dynamics of Sedimentary Basin Evolution
    TECTONOPHYSICS ELSEVIER Tectonophysics 268 (1996) 23-63 Late Precambrian to Triassic history of the East European Craton: dynamics of sedimentary basin evolution A.M. Nlkishin• " " a*, , P.A. Ziegler b, R.A. Stephenson c, S.A.P.L. Cloetingh c, A.V. Fume a, P.A. Fokin a, A.V. Ershov a, S.N. Bolotov a, M.V. Korotaev ", A.S. Alekseev a, V.I. Gorbachev d, E.V. Shipilov e, A. Lankreijer c, E.Yu. Bembinova a, I.V. Shalimov a a Geological Faculty, Moscow State University, Leninskie Gory, 119899 Moscow, Russia b Geological-Palaeontological Institute, University of Basel, Bernoullistr. 32, 4056 Basel, Switzerland c Vrije Universiteit, Faculty of Earth Sciences, De Boelelaan 1085, 1081 HVAmsterdam, Netherlands d NEDRA, Yaroslavl, Russia e Institute of Marine Geophysics, Murmansk, Russia Received 5 September 1995; accepted 31 May 1996 Abstract During its Riphean to Palaeozoic evolution, the East European Craton was affected by rift phases during Early, Middle and Late Riphean, early Vendian, early Palaeozoic, Early Devonian and Middle-Late Devonian times and again at the transition from the Carboniferous to the Permian and the Permian to the Triassic. These main rifting cycles were separated by phases of intraplate compressional tectonics at the transition from the Early to the Middle Riphean, the Middle to the Late Riphean, the Late Riphean to the Vendian, during the mid-Early Cambrian, at the transition from the Cambrian to the Ordovician, the Silurian to the Early Devonian, the Early to the Middle Devonian, the Carboniferous to Permian and the Triassic to the Jurassic. Main rift cycles axe dynamically related to the separation of continental terranes from the margins of the East European Craton and the opening of Atlantic-type palaeo-oceans and/or back-arc basins.
    [Show full text]
  • Article in Press
    +Model PRECAM-2821; No. of Pages 23 ARTICLE IN PRESS Precambrian Research xxx (2007) xxx–xxx The East European Craton (Baltica) before and during the assembly of Rodinia S.V. Bogdanova a,∗, B. Bingen b, R. Gorbatschev a, T.N. Kheraskova c, V.I. Kozlov d, V.N. Puchkov d, Yu.A. Volozh c a Department of Geology, Lund University, S¨olvegatan 12, SE 22362 Lund, Sweden b Geological Survey of Norway, NO-7491 Trondheim, Norway c Geological Institute of the Russian Academy of Sciences, Pyzhevsky per. 7, Moscow 119017, Russia d Institute of Geology, Ufa Science Centre RAS, Karl Marx Street 16/2, Ufa 450000, Russia Received 22 December 2006; received in revised form 26 February 2007; accepted 19 April 2007 Abstract Prior to participating in Rodinia, the East European Craton (Baltica) had undergone a complex process of development. Many of the structures, which were important during the amalgamation of Rodinia, were formed between ca. 1.7 and 1.4 Ga. From ca. 1.6 Ga onwards, the evolution of the western and eastern parts of this Craton followed very different path. While accretion of juvenile continental crust, and eventually, continental collision took place in the west, rifting and extension consistently dominated in the east. Between 1.14 and 0.90 Ga, the Sveconorwegian orogeny marked the incorporation of the East European Craton (Baltica) into Rodinia. This process involved four distinct phases related to Baltica’s movements. During the 1.14–1.10 Ga Arendal phase there was accretion and early collision, during the 1.05–0.98 Ga Agder phase continent–continent collision took place, while the 0.98–0.96 Ga Falkenberg phase and the 0.96–0.90 Ga Dalane phase involved final convergence and post-collisional relaxation, respectively.
    [Show full text]
  • Volgian and Santonian–Campanian Radiolarian Events of the Russian Arctic and Pacific Rim
    Volgian and Santonian–Campanian radiolarian events of the Russian Arctic and Pacific Rim VALENTINA S. VISHNEVSKAYA and GENRIETTA E. KOZLOVA Vishnevskaya, V.S. and Kozlova, G.E. 2012. Volgian and Santonian–Campanian radiolarian events from the Russian Arctic and Pacific Rim. Acta Palaeontologica Polonica 57 (4): 773–790. Radiolarians are widely distributed in two siliceous intervals that coincide with the Tithonian–Berriasian and Santonian– Campanian boundaries in the Mesozoic of the Russian Arctic and Pacific Rim. The first level is rich in organic matter and typical of Jurassic–Cretaceous boundary strata from the Russian North European Margin (Barents−Pechora, Volga−Urals, and Siberian hydrocarbon provinces, as well as western Kamchatka). Abundant and diverse representatives of the family Parvicingulidae provide a basis for establishing the new genus Spinicingula (uppermost Middle Volgian–Lower Berriasian); another new genus, Quasicrolanium (Upper Volgian–Upper Berriasian) is also described. A Santonian– Campanian siliceous interval with radiolarians is documented from the margins of northern Asia (eastern Polar Ural, Kara Basin, Kamchatka). The Boreal genus Prunobrachium makes its first appearance at the Santonian–Campanian boundary and reaches an acme in Campanian strata. Radiolarian data can be used for basin biostratigraphy and correlation, as well as palaeogeographical interpretation of these hydrocarbon−rich facies. The Arctic and northern Pacific rims are well cor− related on the basis of parvicingulids, while in Sakhalin these are absent and calibrations are based on Unitary Associa− tions zones of the Tethys. In addition to the two new genera noted above, five new species (Parvicingula alata, Parvicingula papulata, Spinicingula ceratina, Lithostrobus borealis, and Spongurus arcticus) are erected, while 60 radiolarian species typical of the Russian Arctic and Pacific rims are illustrated.
    [Show full text]