TITLE:
Micro-Bio Stratigraphy of Asmari Formation in Mamoolan Stratigraphy Section, Sout of Khorramabad
AUTHORS:
Peiman Rajabi
KEYWORDS:
Zagros, Asmari, Lorestan, Foraminifera, Depositional Environment
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.6,
June
28,
2016
ABSTRACT: In this paper, Biostratigraphy of Asmari formation to San oligo-Myocene
was studied in North Mamulan, South West Lorestan Province. In this region,
Shahbazan-Asmari carbonate formation is located between Kashkan formation
beneath and evaporative formation of Gachsaran as old as lower Miocene in the
form of disconformity above. From 180 m real thickness observed in this study,
23 genera and 15 species of benthic foraminifera were identified and studied.
These foraminifera were found in four assemblage zones suggesting that this
formation dates back to Oligocene (Chattian-Rupelian) and early Miocene
(Aquitanian-Burdigalian). Moreover, based on microscopic studies and visual
observations, nine microfacies were identified that were deposited in three
zones: lagoon, dam, and shallow open marine.