LITHO- AND BIOSTRATIGRAPHY OF THE FIRZA FLYSCH, OPHIOLITE MIRDITA NAPPE, ALBANIA

S.Gardin, V.Kii*, M.Marroni, F.Mustafa**, L.Pandolfi, A.Pirdeni* and A.Xhomo*

Dipartimento di Scienze della Terra, Universita' di Pisa, Italy, Dipartimento di Scienze della Terra, Universita' di Firenze, Italy, * Institute of Geological Research, Tirana, Albania, ** GeoAlba, Tirana, Albania

Key-words: nannofossils datings, lithostratigraphy, Firza Flysch, Mirdita ophiolites, Albania


ABSTRACT

The lithostratigraphical features and recent discoveries of calcareous nannofossils from the Firza Flysch, Mirdita region (northern Albania) are reported. The Firza Flysch, with the Simoni (=Mirdita) Melange, represent the sedimentary sequences overlying the Albanian ophiolites. The Firza Flysch can be roughly subdivided in three members: the lower member is characterized by the prevalence of ophiolite-derived pebbly sandstones and mudstones, whereas in the middle and upper members the show calcareous and mixed composition turbidites. Nannofossils imply uppermost Tithonian - Late Valanginian age of whole sequence of the Firza Flysch. The collected data suggest the Firza Flysch deposits may be derived from erosion of the Albanian ophiolites during their Late Jurassic - Early Cretaceous tectonics. Age and characteristics of the Firza Flysch can be correlated with the ophiolite-derived deposits from neighbour ophiolite belts of Bosnia and Greece.


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