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Lower Cretaceous exotic intraplate basaltoid olistolith from Biała Woda, Pieniny Klippen Belt, Poland: geochemistry and provenance

Birkenmajer K., Lorenc M.W.

Studia Geologica Polonica

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2008

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Vol. 131

237-246

EN

Geochemical analysis of a basaltic olistolith, K-Ar dated at Lower Cretaceous, which occurs in Upper Cretaceous conglomerates (Jarmuta Formation) of the Pieniny Klippen Belt of Poland, points to trachybasalt field of intraplate basaltoids. The olistolith most probably derived from a volcanic structure located on the Czorsztyn Ridge - a lithospheric splinter of the North European Platform which, during Jurassic-Early Cretaceus, bordered the Pieniny Klippen Belt Basin from the north.

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Olistolit w śródlądowych osadach miocenu rowu Kleszczowa

Czarnecki L. W.

Przegląd Geologiczny

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2004

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Vol. 52, nr 9

899--902

EN

The paper presents the problem of gravity-induced fossil surface mass movements. Along the margins of the Miocene inland basin formed in the Kleszczów Graben, Upper Cretaceous marls forming its northern wall underwent eboulement. Such fragments of older rocks hosted within the younger marine sediments are known as "olistoliths". However, this term has been applied to up to date to structures known from the marine basin shores. This paper describes such a feature occurring at the margin of a continental freshwater basin. As the genesis and formation mechanisms of both structures are identical, it is proposed to extend the usage of the term "olistolith" to cover the inland occurrences, as well.

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Latest Devonian conodonts from an olistolith in the northern part of the Góry Bardzkie, West Sudetes

Haydukiewicz J.

Geologia Sudetica

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1998

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Vol. 31, nr 1

61-68

EN

Latest Devonian conodonts have been recovered from siliceous rock at Bardo Śląskie, Góry Bardzkie (Mts), West Sudetes. The exposure in the Nysa Kłodzka river cut consists of several undisturbed intervals, separated by zones of fault breccia, interpreted as one large olistolith of Devonian rock embedded in a surrounding Lower Carboniferous graywacke. The siliceous rock shows signs of very low-grade contact metamorphism (300-360°C; conodont CAI = 5) attributed to the late Carboniferous granite intrusion. They represent intervals from Mid- to probably Late-expansa Zone, Mid-expansa to the Early-praesulcata Zones and undivided praesulcata-Zone, all suggesting the latest Famennian age for the siliceous host rocks, which appear the youngest Devonian sediments paleontologically documented to date in the allochthonous domain of the Góry Bardzkie. Palmatolepis and Polygnathus are the most frequent genera. The two genera are believed to indicate the deepest pelagic environment of the late Devonian sea. Both the biofacies and lithofacies of the investigated sediments strongly suggest their distal, deep-water basinal origin. The presence of the open-marine pelagic sediments in the uppermost Famennian seems to imply a continuous sedimentation rather, than a break at the Devonian-Carboniferous boundary in the Góry Bardzkie allochthonous domain.