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Fossil karst in the Jurassic of Kościuszko Mound in Kraków (southern Poland)

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Wójcik A. , Garecka M. , Olszewska B. , Wódka M.

tom Vol. 59, No. 1

61--70

Study of four boreholes (each 100 mdeep) drilled in the St. Bronisława Hill (a part of the horst of the Wolski Forest, Kraków area) indicated that within the Oxfordian limestone occur claystones with calcareous rubble (detritus), filling the fossil karst forms. The claystones, that in some cases show planar stratification, contain assemblages of Late Cretaceous (Campanian–Maastrichtian) foraminifers. The Middle Miocene planar laminated limestones have also been found in cavities formed in the Middle Oxfordian limestones. Miocene deposits of this type, filling the fossil karst, were not previously known from the area of Kraków. Both the Upper Cretaceous and the Middle Miocene deposits document probably marine sedimentation that resulted in the filling of the karst system. This type of karst was probably formed before the transgression of the Upper Cretaceous sea and the subsequently before the transgression of the Middle Miocene sea into the area of present horst of the Wolski Forest.

Marmur Błogosławionej Salomei : odmiana wapienia górnojurajskiego i jego rola w małej architekturze

80%

Bromowicz J. , Figarska-Warchoł B.

tom Vol. 64, nr 10

848--860

The paper is an attempt to evaluate the geological and quarrying conditions of the Blessed Salomea “marble”. Its physico-mechanicalproperties were determined in relation to the lithology. The probable volume of excavated rock material was compared to the volume of the small architecture elements, mainly altars and tombstones made of this stone. The comparison indicates that the rocks with similar colour and physico-mechanical properties occur also within other outcrops of Upper Jurassic limestones in the vicinity of Cracow. The “marble” of Blessed Salomea is distinguishable due to its otherfeatures. Besides the ability to take polish, these include the possibilities of cutting very large blocks and ability to be carved for figural and ornamental sculpture. These characteristics are related to the homogeneity caused by the large amount of micrite. So far, no other Jurassic limestone with these distinguishing properties has been found.