Bored and encrusted clasts in the Lower Kimmeridgian carbonates at Sobków (SW margin of the Holy Cross Mts., Poland)
1985; Geological Society of Poland; Volume: 55; Linguagem: Inglês
ISSN
2300-8512
AutoresLeszek Chudzikiewicz, Józef Wieczorek,
Tópico(s)Paleontology and Stratigraphy of Fossils
ResumoDrązenia i inkrustacje klastow w weglanowych osadach dolnego kimerydu w sobkowie (SW obrzezenie Gor Świetokrzyskich) A layer of biomicrite 30 - 40 cm thick with bored and encrusted carbonate clasts occurs in a sequence of shallow marine, carbonate, Lower Kimmeridgian sediments exposed in the quarry Sobkow, SW margin of the Holy Cross Mts. The clasts display several generations of borings (by pelecypods and polychetes) and encrustations (by serpulids and oysters). The clasts were subject to repeated phases of burial, exhumation and overturning accompanied by succesive colonization by boring and encrusting organisms. The described clasts are examples of early lithification of carbonates in a shallow epicontinental sea, with temporarily lowered accumulation rate, but without a stratigraphic condensation.
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