Stop 2: Kanfanar quarry - Upper Aptian–upper Albian unconformity

Conference presentation

• Author: Marta Mileusnić
• Author: Goran Durn
• Author: Ivor Perković
• Author's institution: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mineralogy, Petrology and Mineral Resources)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology

Abstract (english)

The upper Aptian–upper Albian unconformity marks the division between the second, late Tithonian–early/late Aptian megasequence, characterised by facies heterogeneity and considerable thickness, and the third, late Albian– late Santonian megasequence, which is more than 1000 m thick with different facies successions. Deposition of the second megasequence started at the end of the Tithonian with an oscillating transgression resulting mainly in peritidal shallowing-upward cycles. The megasequence is capped by the upper Aptian deposits, which experienced a relatively rapid shallowing, resulting in subaerial exposure (VELIĆ et al., 1989, 2003). This regional event was a consequence of a relative sea-level fall caused by the interaction of eustatic changes and synsedimentary tectonics in the Istrian part of the Adriatic Carbonate Platform (AdCP), resulting in variable duration of shallow-water conditions in different parts of the platform, as well as in varying intensity of erosion of Aptian and Barremian deposits (VELIĆ et al., 1989, 2003). The end of this megasequence was marked by deposition of breccias and conglomerates with common blackened pebbles, representing swamp conditions, interbedded with clay layers.

• Language: english
• Peer review: No peer review
• URN:NBN: urn:nbn:hr:169:023904
• Presentation date: 2023-10
• Project: Number: IP-2019-04-8054; Title (croatian): Zapadnoistarska antiklinala kao idealni prirodni laboratorij za proučavanje regionalnih diskordancija u karbonatnim stijenama; Acronym: WIANLab; Leader: Goran Durn; Jurisdiction: Croatia; Funding stream: Research Projects
• Conference: Title: 7. hrvatski geološki kongres s međunarodnim sudjelovanjem; Acronym: 7. HGK; Location: Poreč, Croatia; Start date: 2024-10-02; End date: 2024-10-04; Assembly type: Poster
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-08-02 09:55:09