Naslov
Vrace near Gračac (Velebit) – Middle to Upper Triassic shallow marine limestones and continental sediments with bauxite

Autori
Tišljar, Josip ; Velić, Ivo ; Vlahović, Igor ; Sokač, Branko ; Grgasović, Tonči

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
9th International Symposium on Fossil Algae - Croatia 2007 : Field-Trip Guidebook and Abstracts

Urednik/ci
Grgasović, Tonči ; Vlahović, Igor

Izdavač
Hrvatski geološki institut

Grad
Zagreb

Godina
2007

Raspon stranica
121-123

ISBN
978-953-6907-15-1

Ključne riječi
shallow-marine carbonates, peritidal shallowing-upward cycles, Diplopora limestones, emersion, bauxite, Triassic, Velebit Mt, Croatia

Sažetak
During the Triassic in the present region of Lika, several phases of emersion and transgression were recorded on the carbonate platform. The emersion phase at the end of Ladinian is most clearly visible in the Vrace area, with the accumulation of terrestrial material (subject to the process of bauxitization), probably lasted throughout the Carnian, perhaps into the Early Norian. Irregulary karstified Ladinian limestone - algal wackestone/packstone with fenestral fabric and alga Diplopora annulata SCHAFHAUTL are deposited in shallow subtidal zone. The Vrace bauxite deposit creating a direct contact between this Ladinien limestones and Norian earl-diagenetic dolomites with fenestral(partly geopetal)and stromatolitic structure.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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