GEOLOGICAL QUARTERLY
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Roman Y. AIZBERG, Valery N. BESKOPYLNY, Tatiana A. STARCHIK and Tamara K. TSEKOYEVA
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Late Devonian magmatism in the Pripyat Palaeorift: a geodynamic model
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............349
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Late Devonian magmatism in the Pripyat Trough, Belarus was associated with the development of the intraplate Pripyat-Donets Palaeorift. Magmatic rocks belong to an alkali-ultrabasic-alkali-basaltoid suite. These are represented by explosive, effusive, subvolcanic and volcanic facies. The magmatic activity and rock composition changes from the periphery to the axial part of the Pripyat Trough, corresponding to the general trend of destructive processes in the rifting zone. Geodynamically, the Pripyat alkali-ultrabasic rocks represent a series of magmatic suites of the Pripyat-Donets palaeovolcanic region coinciding with a zone of disappearance of Late Devonian divergence processes in the south-west of the East European Craton.
Roman Y. Aizberg, Tatiana A. Starchik, Institute of Geological Sciences, National Academy of Sciences of Belarus, Kuprevich 7, 220141 Minsk, Belarus; e-mail:
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; Valery N. Beskopylny, Tamara K. Tsekoyeva, Industrial Association "Belorusneft", Rogachev 9, 246003 Gomel, Belarus; e-mail:
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(received: November 3, 2000; accepted: February 26, 2001).
Key words: Pripyat Palaeorift, Devonian, ultrabasic-alkaline magmatism, geodynamics, palaeovolcanoes, diatremes.
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Hans-Jürgen STEPHAN
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The Young Baltic advance in the western Baltic depression
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............359
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The last Weichselian glacial advance into the western Baltic depression, the so-called "Young Baltic" glacier advance is described. In the southern Baltic depression, ice masses flowed westwards and fanned out in the western Baltic region where they terminated along the end moraines of the East Jutland advance (Denmark), Sehberg advance (Schleswig-Holstein) and Mecklenburg advance (Mecklenburg-Vorpommern). The westward ice advance is likely due to the rapid melting of Norwegian and Swedish ice masses which had previously blocked the more easterly ice masses from draining to the west and north-west. The deposition of a purely eastern-sourced debris facies by a Baltic ice stream in the far west might be the result of ice/bed separation during flow.
Hans-Jürgen Stephan, Landesamt für Natur und Umwelt des Landes Schleswig-Holstein, Hamburger Chaussee 25, 24220 Flintbek, Germany, e-mail:
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(received: March 20, 2001; accepted: May 31, 2001).
Key words: Palaeo-ice stream, Baltic depression, Weichselian, till facies, ice flow.
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James S. ABER and Volli KALM
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Remote sensing of eskers from Vormsi and Väinameri vicinity, northwestern Estonia
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............365
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We have utilised techniques of remote sensing in combination with ground observations in order to investigate eskers of the Vormsi and Väinameri region of northwestern Estonia. Landsat Thematic Mapper (TM) images were the basis for recognition and regional interpretation of esker systems, and kite aerial photography was employed for detailed, low-height views of selected eskers. A special Landsat TM composite was developed to enhance the display of shallow sea floor features. On this basis, we have extended known, land-based eskers across the sea floor, and we have identified additional probable eskers marked by shallow shoals and tiny islands. The known and suspected eskers of Vormsi and surroundings demonstrate a regular pattern in their distribution, which we suggest represents a subglacial drainage network that was anastomosing in character. The esker network is located along the central pathway of the Väinameri ice lobe, and the overall direction of drainage was toward the Palivere glacial limit. We interpret eskers of the Vormsi-Väinameri vicinity as evidence for substantial meltwater discharge beneath the Väinameri ice lobe, which terminated in a proglacial lake.
James S. Aber, Earth Science, Emporia State University, Emporia, Kansas, 66801-5087 USA, e-mail:
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; Volli Kalm, Institute of Geology, University of Tartu, 51014 Tartu, Estonia, e-mail:
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(received: December 7, 2000; accepted: February 2, 2001).
Key words: Estonia, Palivere, Landsat, esker, subglacial meltwater, ice lobe surge.
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Leszek LINDNER, Barbara MARCINIAK, Alexander F. SANKO and Galina K. KHURSEVICH
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The age of the oldest Scandinavian glaciations in mid-eastern Poland and southwestern Belarus
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............373
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Analysis of type localities of Pleistocene deposits from mid-eastern Poland (Kozi Grzbiet, Łuków, Biała Podlaska and Wilczyn) and southwestern Belarus (Smolarka and Postolovo) has provided a new view on the age, limits and correlation of the oldest Scandinavian glaciations in the area. Integration of palaeontological data with determination of the Brunhes/Matuyama boundary (780 ka) at Kozi Grzbiet and Smolarka suggests that the first glaciation (Narevian) preceded this boundary and had a slightly smaller extent in SW Belarus than hitherto considered. The second glaciation (Nidanian) occurred slightly above or at this palaeomagnetic boundary. In Poland it is the first South Polish Glaciation, a till of which can be traced as far as the Holy Cross Mts. In SW Belarus it is represented by a till to the south of Brest and Bereza, and connected there with the oldest glaciation.
Leszek Lindner, Institute of Geology, Warsaw University, Żwirki i Wigury 93, PL-02-089 Warszawa, Poland; Barbara Marciniak, Institute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, PL-00-818 Warszawa, Poland; Alexander F. Sanko, Galina K. Khursevich, Institute of Geological Sciences, National Academy of Sciences of Belarus, Kuprevich 7, 220141 Minsk, Belarus (received: November 22, 2000; accepted: February 7, 2001).
Key words: Poland, Belarus, Early Pleistocene, Scandinavian glaciations, stratigraphic correlation.
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Jan MALEC
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Sedimentology of deposits from around the Late Caledonian unconformity in the western Holy Cross Mts.
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............397
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The Upper Silurian-Lower Devonian section of the western part of the Holy Cross Mts. is composed of greywackes of the Niewachlów Beds, Kielce Beds and Miedziana Góra Conglomerates. They are separated from the terrestrial Gruchawka Conglomerates and Barcza Beds by an erosional surface. Depositional structures recorded in the Silurian greywackes indicate the deep-water sedimentary environment of a flysch facies. The uppermost part of the Kielce Beds and the Miedziana Góra Conglomerates accumulated on a submarine delta fan. These deposits correspond to Late Caledonian molasse and are associated with closure of the Late Silurian basin in the Holy Cross Mts. The Gruchawka Conglomerates, containing fish remains, mark the beginning of the Early Devonian marine transgression. Together with the overlying sandstones and mudstones of the Barcza Beds they form the Old Red Sandstone succession. The Late Caledonian unconformity occurs between the Upper Silurian molasse deposits and Lower Devonian Old Red Sandstone facies, and the stratigraphic gap most likely spans the Pridoli, Lochkovian and lower Pragian. Large thicknesses of Silurian greywackes in the NW part of Kielce, and the high degree of thermal maturity of organic matter, indicate a geotectonic affinity of this region with the Łysogóry Block.
Jan Malec, Holy Cross Mts. Branch, Polish Geological Institute, Zgoda 21, PL-25-953 Kielce, Poland (received: August 26, 1999; accepted: April 11, 2001).
Key words: Holy Cross Mts., Upper Silurian-Lower Devonian, stratigraphy, sedimentology, Late Caledonian unconformity.
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Zdzisław MODLIŃSKI and Bronisław SZYMAŃSKI
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The Ordovician stratigraphy and palaeogeography of the Nida-Holy Cross Mts. area, Poland - a review
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............417
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The Ordovician stratigraphy in the Holy Cross Mts. and the Nida region is reviewed. In the Holy Cross Mts. Ordovician rocks have been identified in the Łysogóry and the Kielce segments in tens of outcrops and borehole sections, in the Nida area in three boreholes. The deposits comprise a thin clastic-carbonate succession including palaeontologically dated Tremadoc, Arenig, Llanvirn, Llandeilo, Caradoc and Ashgill sediments. Their lithology, litho- and biostratigraphy and facies distribution are discussed. The most distinct lithofacies boundary and thickness contrast is observed between the Kielce and Łysogóry regions. The former is characterised by carbonates and clastics of shallower shelf with much greater thicknesses.
Zdzisław Modliński and Bronisław Szymański, Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa, Poland (received: August 26, 1999; accepted: October 12, 1999).
Key words: Holy Cross Mts., Nida region, Ordovician, biostratigraphy, lithostratigraphy, lithofacies.
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Zdzisław MODLIŃSKI and Bronisław SZYMAŃSKI
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The Silurian of the Nida, Holy Cross Mts. and Radom areas, Poland - a review
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............435
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The Silurian deposits of the area are known from both natural exposures and boreholes drilled mainly in the period of 1955-1980. In the south (Nida area) and north (Radom region) they are known from boreholes only. The Silurian succession is monotonous. It comprises shaly deposites in the lower part (Llandovery and Wenlock), and shales, siltstones and sandstones (greywackes) in the upper part (Ludlow and Pridoli).
Zdzisław Modliński and Bronisław Szymański, Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa, Poland (received: August 26, 1999; accepted: October 12, 1999).
Key words: Holy Cross Mts., Silurian, lithology, bio- and lithostratigraphy, lithofacies.
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Wydawnictwa 
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Gaz łupkowy i gaz zamknięty
Mapa obszarów zagrożonych podtopieniami
Seminarium Chłodno o hydrogeologii
Przez ocean czasu
Konferencja Złoża kopalin – aktualne problemy prac poszukiwawczych, badawczych i dokumentacyjnych
II Polski Kongres Geologiczny
