Volume 33 (2023)
Volume 32 (2022)
Volume 31 (2021)
Volume 30 (2020)
Volume 29 (2020)
Volume 28 (2019)
Volume 27 (2018)
Volume 26 (2017)
Volume 25 (2016)
Volume 24 (2015)
Volume 23 (2014)
Volume 22 (2013)
Volume 21 (2012)
Volume 20 (2011)
Volume 19 (2010)
Volume 18 (2009)
Volume 17 (2008)
Volume 16 (2007)
Ichnology on Geirud Formation in the Hangenberg Mass Extinction Event (Famennian-Touranaisian), Zaygon Section, Central Alborz

A Bayat Gol; N Abbassi

Volume 23, Issue 89 , December 2013, , Pages 33-48


  A detailed ichnological study on the Geirud Formation (Late Devonian-Early Carboniferous) from the Zaygon area, central Alborz shows a diverse trace fossils, which include 14 ichnogenera represented by 23 ichnospecies. These trace fossils contains various ethological patterns, such as domichnia, fodinichnia, ...  Read More

The Study of Chondrichtyan Micro remains in upper Famennian Geirud Formation, Central Alborz

M. mohamadi; M. Yazdi

Volume 19, Issue 74 , February 2010, , Pages 85-90


  There are many precious microremains of chondrichtyans (cartilage fishes) in calcareous beds of Geirud Formation. These micro remains consist of teeth, branchial denticles and sales species and genus of the family and subfamily: Phoebodontidae, Protacrodontoidea, HybodontoideaandCtenacanthoidea. Geirud ...  Read More

The First Study of Bryozoans from the Geirud Formation in Central Alborz

M. Mohammadi; A. Ernst; M. Yazdi

Volume 18, Issue 70 , February 2009, , Pages 166-173


       Two bryozoan species are described from the Geirud Formation (Upper Devonian) of Central Alborz. The Geirud Formation is a sequence of nearly 340 meters of alternating silisiclastics and limestone and 1-2 andesitic lava units, with extensive exposures in the Central Alborz mountains. ...  Read More

Biozonation of Geirud Formation in the Eastern Alborz (Damghan Region) based on the Brachiopoda

M. R. Kebria-ee

Volume 18, Issue 71 , January 2009, , Pages 19-30


  Geirud Formation has a wide distribution in the Damghan region. The Formation Lithology is mostly composed of limestone, marly limestone, shale and quartizic sandstone and its thickness ranges from 10 - 200 meters. Brachiopoda of Geirud Formation in the southwest, north and northeast of Damghan region ...  Read More

Stratigraphy of the Upper Devonian Rocks in the Kalariz Section

S. M. Hosseini-Nezhad; M. Yazdi; M. Ghobadi-Pour; H. Gholamalian

Volume 16, Issue 63 , March 2007, , Pages 78-85


        Geirud formation deposits of Kalariz in the Eastern Alborz start with a relatively thick sequence of sandstone, shale, and red, white and brown colored siltstone changing into yellow dolomitic layers, fossiliferous limestone and shaly or marly limestone. This formation ...  Read More