Szczegóły publikacji
Opis bibliograficzny
Kimmeridgian hardground-sequence boundary from the Mesozoic margin of the Holy Cross Mountains (central Poland): implications for the evolution of the northern Tethyan carbonate shelf / Marcin KRAJEWSKI, Piotr OLCHOWY, Michał Zatoń, Tomasz BAJDA // Facies ; ISSN 0172-9179. — 2017 — vol. 63 iss. 3 art. no. 15, s. 1–15. — Bibliogr. s. 13–15, Abstr. — Publikacja dostępna online od: 2017-04-18
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 105907 |
|---|---|
| Data dodania do BaDAP | 2017-06-21 |
| Tekst źródłowy | URL |
| DOI | 10.1007/s10347-017-0496-x |
| Rok publikacji | 2017 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Facies |
Abstract
The sedimentary succession in central Poland records signifcant changes in facies at the turn of the Planula and Platynota zones in the Upper Jurassic, expressed by the drowning of the ramp-type platform and development of an extensive isochronous marl horizon. The topmost level of the marl horizon is a regional hardground, which is interpreted as the third-order sequence boundary Kim 1. In some areas, the hardground was eroded and is only preserved as bored and encrusted clasts. The composition of the borings may indicate that colonization and recolonization of the clasts took place in an extremely shallow water environment. The overall low level diversity of clastencrusting organisms and their occurrence on both sides of clasts indicates frequent overturning and high current activity. However, other extrinsic factors, such as salinity fuctuations, may have been involved. The fnal redeposition and burial of the clasts were related to subsidence through widespread reactivation of Paleozoic faults. Comparison with Middle Oxfordian–Lower Kimmeridgian sequences of central and southern Poland indicates that the carbonate ramp morphology and paleoenvironmental conditions were periodically subjected to signifcant modifcation during phases of extensional tectonics, with the development of fault-controlled intra-platform ridges and basins. These features may have been the NE continuation of parallel swells and basins developed in the southern part of the carbonate platform adjacent to the Tethys.
