International Workshop on the Triassic of Southern Poland

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International Workshop on the Triassic of Southern Poland Pan-European Correlation of the Epicontinental Triassic 4th Meeting INTERNATIONAL WORKSHOP ON THE TRIASSIC OF SOUTHERN POLAND September 3-8, 2007 FIELDTRIP GUIDE Joachim Szulc and Anna Becker (Eds.) Polish Geological Society Polish Geological Institute Institute of Geological Sciences, Jagiellonian University, Cracow Meeting organisers and trip leaders Anna Becker1 Hans Hagdorn2 Maria Kuleta1 Marcelina Łabaj3 Michał Matysik3 Elzbieta Morycowa3 Jerzy Nawrocki1 Grzegorz Niedźwiecki4 Tadeusz Ptaszyński5 Joachim Szulc3 Wiesław Trela1 Zacharski Jarosław6 Stanisława Zbroja1 1 Polish Geological Institute, Warsaw 2 Muschelkalkmusem Ingelfingen, Germany 3 Institute of Geological Sciences, Jagiellonian University, Cracow 4 Strońska Str. 1/12, Warsaw 5 Department of Biology, Warsaw University 6 GEONAFTA, Kraków Official Sponsors of the Conference: 1. Polish Ministry of Science and Higher Education 2. Polish Geological Institute, Warsaw The organisers deeply appreciate the assistance of management, staff and owners of: Lhoist Opolwap, Tarnów Opolski; Heidelberg Gorażdże Cement, Brickyard “Cegielnia Lipie Śląskie”; Kopalnia Dolomitu “Libiąż”, Kopalnia Dolomitu „Stare Gliny” in Jaroszowiec and mines in Żyglin, Tumlin and Baranów. We are also indebted to com- munal administrations of Ozimek and Tarnowskie Góry for their kindness. Scientific Programme Schedule First Day (4th September) STOP I. 1. Gogolin – Röt – Lowermost Muschelkalk (Lower Gogolin Beds) STOP I. Tarnów Opolski – Upper Terebratula Beds-Karchowice Beds STOP I. 3. Strzelce Opolskie – Upper Gogolin Beds-Gorazdze Beds-Terebraula Beds-Karchowice Beds STOP I.4. Krasiejów – Steinmergelkeuper STOP I. 5. Lipie Śląskie – Steinmergelkeuper and Wozniki Limestone STOP I. 6. Napłatki – Górażdze Beds STOP I. 7. Kamień Śląski – Karchowice Beds-lower Diplopora Beds Second Day (5th September) STOP II. 1. Libiąż – Karchowice Beds – Diplopora Beds – Tarnowice Beds STOP II. Podstoki gully near Płaza – Middle Bunstandstein – Lower Röt STOP II. 3. Płaza – Röt – Lower Muschelkalk STOP II.4. Stare Gliny – Lower and Middle Muschelkalk, Upper Keuper, Lower Jurassic Third Day (6th September) STOP. III. 1. Laryszów – Upper Muschelkalk – Boruszowice Beds STOP III. Żyglin – Lower Gogolin Beds STOP III. 3. Cynków – Wozniki Limestone (Norian) Fourth Day (7th September) STOP. IV.1. Zygmuntówka - Permian conglomerates STOPS. IV. and IV.3. Tumlin-Gród quarry and Sosnowica quarry – Lower Buntsandstein aeolian sandstones STOP. IV.4. Zachełmie – Paleozoic/Triassic disconformity STOPS. IV.5 and IV.6. Kopulak and Baranów – Upper Buntsandstein fluvial depositional systems Fifth Day (8th September) STOP. V.1. Czerwona Góra – Lower Buntsandstein fluvial depositional system STOP. V.. Witulin - Röt –Muschelkalk transition STOP. V.3. Wióry – Middle Buntsandstein fluvial deposits STOP. V.4. Museum of Nature and Technology at Starachowice - Ichnofauna and other fossils of Buntsandstein Structural setting of the Germanic Triassic and problems with its stratigraphical setup A preface Joachim Szulc During Triassic times the Germanic Basin was situated at the northern periphery of the Western Tethys Ocean hence this basin is called also Northern Peritethys Basin. The Polish part of the Germanic Basin was strongly influ- enced by inherited Variscan structures which controlled the basin differentiation and subsidence pattern in Triassic times. The Mid Polish Trough, that played the role of the main dep- ocentre, was controlled by the Teisseyre-Tornquist Line (TTL). The TTL gave also rise to the East Carpathian seaway com- municated with the Tethys Ocean since Olenekian time. The other important faults were the Silesian-Moravian Fault form- ing another gateway and the Cracow – Odra- Hamburg Fault where another depocentre developed (Fig. 1). In the western part of the basin the main role played the Elbe Fault (EF) and the Saxothuringian Lineament (STL) while the NW part of the basin was influenced by the North Sea rifting belt. Synsedimentary tectonics resulting in structural differen- tiation of the Germanic Basin was active practically through- Fig. 1. Principal tectonic elements controlling the eastern part of the out the entire Triassic. In Lower Triassic several phases of Germanic Basin in Triassic times. TTL – Teiseyere-Tornquist Line, block tectonics resulted in basinwide unconformities for in- VF – Variscan orogenic front, SMF – Silesian-Moravian Fault; COH stance the Volpriehausen unconformity in the NW part of the – Cracow-Hamburg Fault line; EF – Elbe Fault; STL – Saxothuringian Lineament basin. Basinwide tectonic activity during Middle Buntsand- stein again dominated by block faulting resulted in two re- gional unconformities; the Detfurth and Hardegsen discor- and fluidisation, are common features in Buntsandstein clas- dances. The latter can be correlated from the Netherlands and tics sediments (Schüler et al., 1989). Seismically-induced N Germany to central Poland. At the same time, the subsid- synsedimentary deformations are particularly common in the ence rate of the Mid Polish Trough (MPT), superimposed upon marine Muschelkalk carbonates (Szulc, 1993; Dualeh, 1995; the Teisseyre – Tornquist Lineament, increased threefold, Voigt & Linnemann, 1996; Rüffer, 1996) and in Upper Trias- when compared to the rate for the Lower Buntsandstein (see sic deposits (Szulc, 2005; Szulc et al., 2006) (see also Fig.38). Becker & Nawrocki, this volume). In spite of the intense tectonic activity the main eustatic Migration of the Muschelkalk depocentre in Mid Triassic pulses in the Triassic are generally well seen in the Peri-Te- times from Central Poland to Central Germany is another thys basins, in particular for the late Olenekian – early Carnian example illustrating well the crustal mobility (Szulc, 2000). interval. Significant progress of sequence stratigraphy and Differentiated crustal movements featured also the late magnetostratigraphy has improved the potential and reli- Triassic when in Carnian times intensive rifting occurred in ability of dating and correlation of the most pronounced NW Germany (Frisch & Kockel, 1999) whereas the southern transgressive-regressive pulses recognized in the area. The and eastern subbasins stayed intact. In contrast, during de- sequence stratigraphic frameworks from the Alpine and position of the Schilfsandstein did rifting occur across the Germanic basins display good correlation at the level of 3rd whole basin, giving the concurrent up and down block move- order sedimentary sequences (see discussion in Szulc, ments. As a result the Schilfsandstein anastomosing fluvial 2000). channels were superimposed upon the graben network while In addition to 3rd order depositional cycles, higher fre- the uplifted blocks were eroded, resulting in prominent local quency cycles (4th and 5th order) have also been studied in the unconformities (Dittrich, 1989). Triassic of Central Europe. Most of these high-frequency Vigourous translatory faulting in Norian times, produced cycles are ascribed to Milankovitch orbital rhythms of differ- an unconformity between the Middle and Upper Keuper suc- ent periodicity and they have been used for construction of cessions. The strike-slip faulting is documented by the flower- chronostratigraphic scale of the Germanic Triassic and for like pattern of faults common in the Norian succession further-going inferences including those about the strati- (Deczkowski & Gajewska, 1977; Frisch & Kockel, 1999). Fi- graphic boundaries (see discussion in Bachmann & Kozur, nally, some additional, tectonically induced unconformities 2004). have been defined in the Rhaetian sequences in Germany (see However, the a priori assumed orbitally-driven cycles have also overview by Beutler, 2005). not been verified by means of radiometric age dating. We Apart from the unconformities, there are numerous direct should still bear in mind that Milankovitch cyclicity was evidences of syndepositional crustal mobility such as small similarly considered responsible for the high-frequency sedi- synsedimentary faults and dilation cracks that developed mentary cycles in the Middle Triassic carbonates of the Do- within the Triassic deposits and reached the basement rocks lomites (Goldhammer et al., 1987), but this has been totally (Głazek & Roniewicz 1976) or seismically-induced liquefaction disproved by detailed ammonoid examination and, first of all, 5 A preface by radiometric age data (Mundil et al., 2003). Therefore, the Conclusion Triassic cycles in the Germanic domain, where no one radio- metric age datum exists until now (!), should be treated cau- It seems that considering the above outlined correlation tiously, and for time being, the more far-reaching inferences hindrances, the Triassic of the Germanic Basin needs far- seem to be purely speculative. Caution is especially needed reaching, detailed sedimentological studies. I have an impres- because the Germanic Basin has been strongly influenced by sion, that there is a major discrepancy between the basic un- non-cyclic phenomena such as storms and/or above discussed derstanding of the main controls of the “sedimentary factory” vigorous synsedimentary tectonism, which might have over- featuring the basin and the hypothetical cyclostratigraphical printed or even obliterated shorter-term climatic signals. In constructions. Certainly the better sedimentological recogni- addition, the continental sedimentary successions, prevailing tion along with further progress in the bio-, magneto- and in the Lower and Upper Triassic, are poor in age-diagnostic
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