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Lithostratigraphy of Jurassic sedimentary rocks in Qayen area, eastern Iran

Babazadeh S.

Volumina Jurassica

2006

Vol. 4, no. 1

78-78

The Jurassic sedimentary rocks dominate the surface exposure of western Qayen. They are extensively located at Doust-abad region. The focus of this study is on the lithofacies analysis of the sediments. The Jurassic rocks consist of the shale-limestone unit with intercalation of sandstone followed by massive limestone and is topped by limestone-argillaceous limestone with thin parallel lamination of shale. Three patterns of facies dominate the formation. Gray to black shale-mudstone facies in the lower part, biointrasparite/biopelsparite in the middle part and gray micritic limestone/argillaceous limestone. The main marine fauna include Lenticulina aff. quenstedti, Nodosaria cf. striatojuensis, Lingulina nodosaria, Haurania aff. amiji, miliolids, corals, crinoids, ammonites and echinoids.

Jurassic – Early Cretaceous succession in Ab-Band area, High Zagros (SW Iran)

Moghaddasi J., Babazadeh S.

Volumina Jurassica

2006

Vol. 4, no. 1

99-99

The Jurassic - Early Cretaceous sedimentary rocks of Ab-Band area are located in the High Zagros, southwest Iran. Two sections are examined in this region. They are consisting of two units: Chert and Turbidites Unites. Chert Unit consists of red radiolarian chert with 50% Radiolaria, calcareous chert, white and grey radiolarian chert and argillaceous chert. The best preserved radiolarian fauna occurs in this unit. Turbidite Unit is composed of calcarenite, pelbiomicrosparite with nodular radiolarian chert and argillaceous limestone bearing benthic foraminifera. Two size radiolarian fauna are reported in thin sections. The larger forms are found in lower part of section AÁ and the smaller forms are occuring in the radiolarian chert at section Ca in the Chert Unit. The benthic marine fauna include Pseudocyclamina sp., Pseudocrysalidina sp., Lenticulina aff. quenstedti, miliolids and echinoids.