Naslov
Sedimentary evidence of Pleistocene asteroid impact event on Krk Island

Autori
Marjanac, Tihomir ; Čalogović, Marina

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Field Guidebook DIG 4th International field workshop on DInaric Glaciation. Early/Middle Pleistocene glciations of NE Mediterranen - filling the gaps in reconstructing its geological history and climate change ; Focus on glaciogenic sedimentary palaeoenvironments of Krk Island. / Marjanac, Ljerka - Zagreb : Hrvatska akademija znanosti i umjetnosti (HAZU), 2018, 4-16

Skup
4th International Workshop on DInaric Glaciation (DIG)

Mjesto i datum
Baška, Hrvatska, 21.05.2018. - 26.05.2018

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Krk, Impact structure, Krk breccia,

Sažetak
Asteroid and comet impacts are important catastrophic events in the Earth history, and their recognition and timing allow us to document the rate of cosmic catastrophes and resultant environmental stress. Some of these events left their mark in geological record as the cause of very rapid (almost instantaneous) climate changes, biotic stresses, and extinctions. Geologically young impact events left their mark in topography as impact craters, whereas older events are preserved as impact structures without visible crater, but display impact-generated facies such as breccia lens and impact melt-rocks as erosional remnants. Most old impact structures are deeply eroded, but some are buried by younger sediments and unexposed. The island of Krk is site of proposed impact structure which is located in central part of the island and has reconstructed size of 11 x 14 km. The structure was drilled by Krk-1 exploration well in 1967, and recognized as a breccia lens. The well was drilled through breccia for 1500 m, and revealed significant stratigraphic incompleteness.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA