Naslov
Triassic of Dalmatia - Evidence of a failed rift (Muć section)

Autori
Marjanac, Tihomir

Izvornik
Vijesti Hrvatskoga geološkog društva (1330-1357) 37 (2000), 2; 117-126

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Triassic; sediments; volcanics; geotectonics; Dinarides

Sažetak
Muć section is a “classical” section of Triassic deposits and volcanics. Lower Triassic deposits were deposited in a shallow sea, and two facies can be recognized: Seiser Beds and Kampiler Beds. The oldest Middle Triassic deposits are represented by Otarnik-breccias which are characterized by coarse debris and partial late-diagenetic dolomitization. Anisian dolomites underlie black carbonate clastics. Their depositional environment is interpreted as reletively deep subitdal with pronounced bottom topography. Pyroclastics are developed above these black clastics, and two types can be differentiated; older pyroclastics are thin-bedded vitroclastic base-surge tuffs, and the younger are green pietra verde ignimbrite pyroclastics. Ladinian sediments are represented by bitominous mass flow deposits which were deposited in deeper sublitoral. The Scythian/Anisian boundary is marked by emersion which yielded Otarnik-breccias. The upper Anisian pyroclastics are attributed to rifting, and their genesis is associated with explosive volcanism. Large plant debris and lithoclasts in surrounding sediments document vicinity of emergent land. The rifting was aborted after reletively short period of activity, and shallow marine conditions were reestablished, to last through most of Mesozoic.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA