Facieses and depositional environment of cretaceous in south east of Tehran (north west of Bibisharbanoo mountain)
Subject Areas :
GH
Mohammadi
1
(دانشگاه آزاد اسلامی واحد تهران جنوب، تهران، ایران)
Keywords: sedimentary model, Cretaceous units, facies, Sedimentary Environment,
Abstract :
Cretaceous rock out crops in south east of Tehran and north west of Bibisharbanoo Mountains with120 m in thickness composed of compact white limestone rocks and light red limestone rocks withEchinoderms and Braciupods and at the end of sequence thickness white or red calcareous layer with alat of gastropods and foraminifer are completing this sequence. Field and microscopic (petrographic)studies led to tecognition 8 carbonate.Facieses A (bioclastice mudstone) with pelagic bioclasts.Facieses B (bioclastic wackston) with pelagic bioclasts.Facieses C (bioclastic packstone) with pelagic bioclasts.Facieses (A B C) indicates medium to relatively deep marine environments (open marine)Facieses D (bioclastic grindstone) and E (intraclastic grindstone )indicates high energy.Environment (barrier)Facieses F (bioclastic packs tone) with bentic bioclasts.Facieses G (bioclastic wacks tone) woth bentic bioclasts.Facieses H (peloid wacks tone) with bentic bioclast indicates lagoon environment.These facieses indicates a carbonate basinet in shape in shape homoclinal ramp.
