TITLE:
Biostratigraphic and Lithostratigraphic Study of Fahliyan Formation in Kuh-E-Siah (Arsenjan Area, North-East of Fars Province)
AUTHORS:
Masoud Abedpour, Massih Afghah, Vahid Ahmadi, Mohammadsadegh Dehghanian
KEYWORDS:
Biostratigraphy, Lithostratigraphy, Fahliyan, Zagros, Iran
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.12,
December
29,
2016
ABSTRACT: Fahliyan Formation is importance in terms of Zagros
stratigraphy since it is one of the oil reservoir rocks at the
Jurassic-Cretaceous boundary. This rock unit consists of two types of deep and
shallow facies in Zagros area. Recognition of bio-zones as well as
discontinuity or continuity between the studied formation and the encompassed
stratais taken into consideration. In order to study biostratigraphy on Fahliyan Formation, the stratigraphic section of Kuh-e-siah in the
north-east of Fars Province was selected. In this section, Fahliyan Formation
is measured 345 m consisting of thin to
medium-bedded of limestone with the interbeds of sandy and dolomitic
limestones. Fahliyan Formation conformably overlies Surmeh formation and
underlies the marls of Gadvan formation. Vertical distribution of the
identified foraminifers and calcareous algae confirms presence of 3 biozones in
the sediments of Fahliyan Formation, as follows: 1) Calpionella alpina zone; 2) Pseudochrysalidina conica
zone; 3) Pseudocyclammina
lituus-Trocholina sp. assemblage zone. Based on Established biozones, the
age of Fahliyan Formation in Kuh-e-Siah section was determined from Berriasian
to Late Hauterivian.