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Triassic of Dalmatia - Evidence of a failed rift (Muć section) (CROSBI ID 91164)

Prilog u časopisu | izvorni znanstveni rad

Marjanac, Tihomir Triassic of Dalmatia - Evidence of a failed rift (Muć section) // Vijesti Hrvatskoga geološkog društva, 37 (2000), 2; 117-126-x

Podaci o odgovornosti

Marjanac, Tihomir

engleski

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

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.

Triassic; sediments; volcanics; geotectonics; Dinarides

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Podaci o izdanju

37 (2)

2000.

117-126-x

objavljeno

1330-1357

1848-9907

Povezanost rada

Geologija