Naslov
Facies characteristics of the Upper Jurassic limestones along the road Banska vrata-Breze (Karst Dinarides, Croatia)

Autori
Bucković, Damir ; Vasiljević, Eduard

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
20th International Karstological School “Classical Karst” ; Karst Forms and Processes, Guide Book & Abstracts / Mihevc, Andrej ; Gabrovšek, Franci - Postojna : Karst Research Institute - ZRC SAZU, 2012

Skup
20th International Karstological School “Classical Karst”

Mjesto i datum
Postojna, Slovenija, 18.06.2012. - 22.06.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Upper Jurassic; facies; limestones; Karst Dinarides; Croatia

Sažetak
The facies succession exposed along the road Banska Vrata-Breze suggests that after deposition of the Early Upper Jurassic shallow subtidal deposits of Facies A, synsedimentary tectonics caused the formation of a regional sedimentary trough connected with the open basin. On the margin of such a deeper-water sedimentary environment below the fair-weather wave-base, deposits of facies B slowly accumulated simultaneously influenced by pelagic material brought from the open sea area. By periodic shedding of the shallow-water carbonate material from the reefal/perireefal margin of the intraplatform trough by mechanisms of the gravity flows, triggered by periodical storms and/or, more likely, smaller earthquakes, the deeper-water marginal part of the trough was progressively filled up when normaly graded bioclastic intervals of facies C were deposited. When this shallowing reached the shallow subtidal the shallow-water allochems and bioota of facies D was developed. Therefore, once, the shallow subtidal environment was re-established, the rate of carbonate accumulation was rather high capping the thick bioclastic unit of facies C, resulting in further shallowing which reached the low tide and even intertidal levels with sporadic subaeral exposure.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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