New Findings in 
Applied Geology

New Findings in Applied Geology

Biostratigraphy and microfacies analysis of the Asmari Formation in SE of Aleshtar, Lorestan

Document Type : Research Paper

Authors
Abstract
The Asmari Formation in the Sarab-e Narm setion in south-east of Aleshtar town was measured and sampled in order to study its foraminiferal faunas and microfacies. Based on the stratigraphical distribution of the larger benthic foraminiferas in the studies section two assemblage zones have been recognized. Assemblage zone I  represents a Aquitanian age and includes Miogypsina barsaensis, Peneroplis farsensis, Elphidium sp., Nummulitids sp. and Schlumbergina sp., Assemblage zone II is characteristic of  Burdigalian age which consists of Borelis melo curdica, Meandropsina iranica, Austrotrillina cf. howchini, A. cf. striata, A. cf. asmariensis and Dendritina rangi. This section  lacks lower Asmari Formation. According to the petrographic analysis of the deposits, five microfacies types were identified. The Asmari Formation has been deposited on a carbonate ramp in which facies belts of middle ramp and inner ramp are distinguishable.
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  • Receive Date 22 January 2013
  • Revise Date 08 July 2014
  • Accept Date 03 July 2013