Naslov
Middle Permian reef complex on the Velebit Mt - Ba ke O tarije.
(Middle Permian reef complex on the Velebit Mt - Baške Oštarije.)

Autori
Marjanac, Tihomir ; Sremac, Jasenka

Izvornik
Harold Readinǵs IAS Lecture Tour ́99 - Field-trip guidebook: Some Carbonate and Clastic Successions

Vrsta, podvrsta
Ostale vrste radova, ostali članci/prilozi

Godina
1999

Ključne riječi
Permian; reef; Velebit Mt.;

Sažetak
The superimposed Middle Permian carbonate bodies near Baške oštarije are interpreted as ecological and morphological reef complex, based on their characteristic fossil association, body geometry, and characteristic internal organisation. The superposition of the reefal bodies and the sediments studied document rapid sea-level changes, so that reef vertical growth was aborted during relative sea-level falls, and resumed during sea-level rise. Subaerial weathering created debris which was deposited in internal cavities and voids - further reducing the porosity, and on the reef flanks. The reef main body, as well as the flanking debris was levelled by weathering during relative sea-level falls, so that at the time of renewed colonization the substrate was virtually flat. The reef evolution can be summarized in 7 phases: 1. substrate colonization 2. formation of primary reef framework with dwellers 3. reef framework incrustation 4. early lithification 5. shallowing (relative sea-level fall) followed by weathering and erosion 6. infilling of secondary reef porosity 7. deepening (relative sea-level rise) followed by recolonization (or final burial as after reef body C)

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA