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Paper Information

Journal:   RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE"   2006 , Volume 23 , Number 1; Page(s) 57 To 78.
 
Paper: 

BIOSTRATIGRAPHY OF LATE PERMIAN DEPOSITIONAL SEQUENCE IN NORTHEASTERN ISFAHAN (CHAHRISEH AREA)

 
 
Author(s):  GHOBADIPOUR MANSOUREH, JAFARIAN M.A.
 
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Abstract: 

The studies of microfauna of Late Permian deposits in Chahriseh area, NE Isfahan, Central Iran, revealed that fossiliferous Late Permian sediments unconformably overlays Late Devonian strata (Late Famennian).
Based on conodont and palynomorph studies, a hiatus can be considered in this area comprising the whole Carboniferous and Early Permian. This hiatus can be attributed to Hercynian uplifting and erosion by see-level fall caused by Permo-Carboniferous ice sheets and removal of enormous thickness of sediments.
Late Permian gray thin to thick bedded limestones contain abundant smaller foraminifers, algae, corals, sponges, gastropods, bivalves, brachiopods, bryozoans, trilobites, etc., and ends with a. lateritic red bed. Middle Triassic sandstones and then yellowish brown thick bedded dolomites are overlain the Permian sediments. The laterite horizon and hiatus here may be related to the uplifting and epirogenic phase caused by collision of Laurasia and Gondwana lands to build Pangea Supercontinent in Late Permian/Early Triassic time-interval.
By studying 130 thin-sections of Permian rocks, 36 genus (72 species) of foraimnifers, 5 genus (5 species) of red and green algae, and 2 bryozoan taxa were identified. Based on strtigraphic distribution of microfossils, 6 local biozones were distinguished which can be related to Late Permian (Late Morghabian-Djulfian) time.

 
Keyword(s): BIOSTRATIGRAPHY, PERMIAN
 
References: 
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