| mhorn | Дата: Saturday, 04.05.2013, 17:41 | Сообщение # 1 |
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| Birkenmajer K., Gedl P. (2012) Jurassic and Cretaceous strata in the Maruszyna IG-1 Deep Borehole (Pieniny Klippen Belt, Carpathians, Poland): lithostratigraphy, dinoflagellate cyst biostratigraphy, tectonics // Studia Geologica Polonica, Vol.135. P.7-54.
pdf: http://sgp.ing.pan.pl/135_pdf/SGP135_007-054.pdf
The paper presents core description of the Maruszyna IG-1 Deep Borehole located in the southernmost part of the Pieniny Klippen Belt of Poland, at the Kraków-Zakopane geotraverse of the Polish Carpathians. In the borehole, two Laramian nappes have been recognized: the Pieniny Nappe, PN (0 down to 930-960 m below the surface), and the Branisko Nappe, BN (1225-4843 m below the surface). The rocks of the Branisko Nappe are unconformably covered by the Maastrichtian marine molasse (conglomerates with large olistoliths derived from this nappe) - the Jarmuta Formation, JmF (930-1190 m below the surface). The Laramian overthrust zone: PN over JnF (and BN) lies at 930-960 m below the surface. The Branisko Nappe is subdivided into three first-order (major) and numerous, second-order (minor) tectonic scales. 29 samples from the Middle Jurassic, Lower and Upper Cretaceous rocks have been analyzed for palynofacies and organic-walled dinoflagellate cysts. Biostratigraphic interpretation of dinoflagellate cyst assemblages generally confirms the ages of the earlier-distinguished Jurassic and Cretaceous lithostratigraphic units in this borehole. An Aalenian dinoflagellate cyst assemblage from rocks attributed to the Harcygrund Shale Formation, suggests a slightly wider time-range of this unit than hitherto assumed: Aalenian-Lower Bajocian.
Middle Jurassic - Lower Cretaceous ammonites & aptychi
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