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  Estonian Journal of Earth Sciences

ISSN 1736-7557 (electronic)  ISSN 1736-4728 (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences, Geology
Published since 1952

Estonian Journal of Earth Sciences

ISSN 1736-7557 (electronic)  ISSN 1736-4728 (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences, Geology
Published since 1952

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The Llandovery–Wenlock boundary interval in west-central continental Estonia: an example from the Suigu (S-3) core section; pp. 1–17

(Full article in PDF format) doi: 10.3176/earth.2014.01


Authors

Peep Männik, Anne Põldvere, Viiu Nestor, Toivo Kallaste, Tarmo Kiipli, Tõnu Martma

Abstract

A gap corresponding to several conodont and chitinozoan zones occurs in the Llandovery–Wenlock boundary interval in some sections in the western coastal region of Estonia and on islands in the Muhu Strait. New data from the Suigu (S-3) core section demonstrate that the gap has geographically wider distribution in western continental Estonia. Detailed study of faunas from that section revealed that here the gap corresponds to at least four conodont zones (from below): the Lower and Upper Pseudooneotodus bicornis and Lower and Upper Pterospathodus pennatus procerus zones, but probably also the upper(most) Upper Pt. amorphognathoides amorphognathoides Subzone and the Lower Kockelella ranuliformis Zone (or part of it) are missing. In sense of chitinozoan biostratigraphy, the gap correlates with most of the Margachitina margaritana Zone. Only the uppermost part of this zone is represented in the section. However, although the gap in the Suigu (S-3) core section is distinct and well dated biostratigraphically, the d13C curve demonstrates no evidence of it. Causes of this controversy are still waiting to be revealed.
Our data indicate that changes in sedimentation in the Llandovery–Wenlock boundary interval occurred earlier in the distal graptolite-bearing and later in the proximal environments. Most probably, sedimentation in the Baltic Palaeobasin in the late Telychian and early Sheinwoodian was strongly affected by tectonic evolution of the Baltoscandian foreland basin.

Keywords

conodonts, chitinozoans, lithology, geochemistry, stratigraphy, Silurian, Estonia.

References

Cramer , B. D. , Loydell , D. K. , Samtleben , C. , Munnecke , A. , Kaljo , D. , Männik , P. , Martma , T. , Jeppsson ,  L. , Kleffner , M. A. , Barrick , J. E. , Johnson , C. A. , Emsbo , P. , Joachimski , M. M. , Bickert , T. & Saltzman , M. R. 2010. Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500kyr) integrated conodont , graptolite , and carbon isotope (δ13Ccarb) biochemostratigraphy across the Llandovery–Wenlock (Silurian) boundary: Is a unified Phanerozoic time scale achievable? GSA Bulletin , 122 , 1700–1716.
http://dx.doi.org/10.1130/B26602.1

Flügel , E. 2004. Microfacies of Carbonate Rocks. Springer , Berlin , 976 pp.
http://dx.doi.org/10.1007/978-3-662-08726-8

Harris , M. , Sheehan , P. , Ainsaar , L. , Hints , L. , Männik , P. , Nõlvak , J. & Rubel , M. 2005. The Lower Silurian of Estonia: facies , sequences and basin filling. In The Sixth Baltic Stratigraphical Conference , August 23–25 St. Petersburg , Russia (Koren , T. , Evdokimova , I. & Tolmachova T. , eds) , pp. 30–33. VSEGEI , St. Petersburg.

Hints , O. , Killing , M. , Männik , P. & Nestor , V. 2006. Frequency patterns of chitinozoans , scolecodonts and conodonts in the upper Llandovery and lower Wenlock of the Paatsalu core , western Estonia. Proceedings of the Estonian Academy of Sciences , Geology , 55 , 128–155.

Jeppsson , L. 1997. A new latest Telychian , Sheinwoodian and Early Homerian (Early Silurian) standard conodont zonation. Transactions of the Royal Society of Edinburgh: Earth Sciences , 88 , 91–114.
http://dx.doi.org/10.1017/S0263593300006854

Jeppsson , L. & Anehus , R. 1995. A buffered formic acid technique for conodont extraction. Journal of Paleontology , 69 , 790–794.

Jeppsson , L. & Männik , P. 1993. High-resolution correlations between Gotland and Estonia near the base of Wenlock. Terra Nova , 5 , 348–358.
http://dx.doi.org/10.1111/j.1365-3121.1993.tb00268.x

Jeppsson , L. , Anehus , R. & Fredholm , D. 1999. The optimal acetate buffered acetic acid technique for extracting phosphate fossils. Journal of Paleontology , 73 , 964–972.

Kaljo , D. , Kiipli , T. & Martma , T. 1997. Carbon isotope event markers through the Wenlok–Pridoli sequence at Ohesaare (Estonia) and Priekule (Latvia). Palaeogeography , Palaeo­climatology , Palaeoecology , 132 , 211–223.
http://dx.doi.org/10.1016/S0031-0182(97)00065-5

Kaljo , D. , Martma , T. , Männik , P. & Viira , V. 2003. Implications of Gondwana glaciations in the Baltic late Ordovician and Silurian and a carbon isotopic test of environmental cyclicity. Bulletin de la Societe Geologique de France , 174 , 59–66.
http://dx.doi.org/10.2113/174.1.59

Kiipli , T. , Kallaste , T. , Nestor , V. & Loydell , D. K. 2010. Integrated Telychian (Silurian) K-bentonite chemo­stratigraphy and biostratigraphy in Estonia and Latvia. Lethaia , 43 , 32–44.
http://dx.doi.org/10.1111/j.1502-3931.2009.00162.x

Kiipli , T. , Kallaste , T. & Nestor , V. 2012. Correlation of upper Llandovery–lower Wenlock bentonites in the När (Gotland , Sweden) and Ventspils (Latvia) drill cores: role of volcanic ash clouds and shelf sea currents in determining areal distribution of bentonite. Estonian Journal of Earth Sciences , 61 , 295–306.
http://dx.doi.org/10.3176/earth.2012.4.08

Lazauskienė , J. , Stephenson , R. , Šliaupa , S. & van Wees , J.-D. 2002. 3-D flexural modelling of the Silurian Baltic Basin. Tectonophysics , 346 , 115–135.
http://dx.doi.org/10.1016/S0040-1951(01)00231-1

Loydell , D. K. , Kaljo , D. & Männik , P. 1998. Integrated bio­stratigraphy of the lower Silurian of the Ohesaare core , Saaremaa , Estonia. Geological Magazine , 135 , 769–783.
http://dx.doi.org/10.1017/S0016756898001423

Loydell , D. K. , Männik , P. & Nestor , V. 2003. Integrated bio­stratigraphy of the lower Silurian of the Aizpute-41 core , Latvia. Geological Magazine , 140 , 205–229.
http://dx.doi.org/10.1017/S0016756802007264

Männik , P. 2007a. An updated Telychian (Late Llandovery , Silurian) conodont zonation based on Baltic faunas. Lethaia , 40 , 45–60.
http://dx.doi.org/10.1111/j.1502-3931.2006.00005.x

Männik , P. 2007b. Some comments on the Telychian–early Sheinwoodian conodont faunas , events and stratigraphy. Acta Palaeontologica Sinica , 46 (Suppl.) , 305–310.

Männik , P. 2010. Distribution of Ordovician and Silurian conodonts. In Viki Drill Core (Põldvere , A. , ed.) , Estonian Geological Sections , 10 , 21–24.

Mullins , G. L. 2000. A chitinozoan morphological lineage and its importance in Lower Silurian stratigraphy. Palaeontology , 43 , 359–373.
http://dx.doi.org/10.1111/1475-4983.00131

Nestor , H. 1990. Locality 9:1. Silurian sequences at Särghaua field station. In Field Meeting Estonia 1990. An Excursion Guidebook (Kaljo , D. & Nestor , H. , eds) , pp. 184–186. Estonian Academy of Sciences , Tallinn.

Nestor , H. 1997. Silurian. In Geology and Mineral Resources of Estonia (Raukas , A. & Teedumäe , A. , eds) , pp. 89–106. Estonian Academy Publishers , Tallinn.

Nestor , H. & Einasto , R. 1997. Ordovician and Silurian carbonate sedimentation basin. In Geology and Mineral Resources of Estonia (Raukas , A. & Teedumäe , A. , eds) , pp. 192–204. Estonian Academy Publishers , Tallinn.

Nestor , V. 1994. Early Silurian Chitinozoans of Estonia and North Latvia. Academia , 4. Estonian Academy Publishers , Tallinn , 163 pp.

Nestor , V. 2003. Distribution of Silurian chitinozoans. In Ruhnu (500) Drill Core (Põldvere , A. , ed.) , Estonian Geological Sections , 5 , 13–14.

Nestor , V. 2005. Chitinozoans of the Margachitina margaritana Biozone and the Llandovery–Wenlock boundary in West Estonian drill cores. Proceedings of the Estonian Academy of Sciences , Geology , 54 , 87–111.

Perens , H. 1995. Transition beds of Jaani and Jaagarahu Regional Stages on Saaremaa Island. Bulletin of the Geological Survey of Estonia , 5 , 12–19.

Põldvere , A. & Nestor , H. 2010. Core description and terminology. General geological setting and stratigraphy. In Viki Drill Core (Põldvere , A. , ed.) , Estonian Geological Sections , 10 , 5–16.

Põlma , L. 1982. Comparative Lithology of the Ordovician Carbonate Rocks in the Northern and Middle East Baltic. Valgus , Tallinn , 164 pp. [in Russian , with English summary].

Rubel , M. , Hints , O. , Männik , P. , Meidla , T. , Nestor , V. , Sarv , L. & Sibul , I. 2007. Lower Silurian biostratigraphy of the Viirelaid core , western Estonia. Estonian Journal of Earth Sciences , 56 , 193–204.
http://dx.doi.org/10.3176/earth.2007.01

 
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