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)
Stratigraphy and Palaeontology
Lithostratigarphy and Biostratigaraphy of the Dalichai Formation in Absharaf Section, Northwest of Damghan on the base of Ammonites (East Alborz)

marjan zadesmaeil; Mahmoud Reza Majidifard; Seyed Hamid Vaziri; Davood Jahani

Volume 31, Issue 2 , September 2021, , Pages 91-100


  The Middle and Upper Jurassic sedimentary well successions is located in the northwestern Damghan, (eastern Alborz range). The Dalichai Formation with a thickness of 618 meters in the studied section consists of marl, limestone and marly limestone. The lower boundary with the siliciclastic of the underlying ...  Read More

Primary mineralogy of Dalichai carbonate formation and separation of upper boundary with Lar formation based on geochemical studies in northeast of Semnan

Elmira Shahkaram; Mohammad Hosein Adabi; Davood Jahani; Seyed Hamid Vaziri

Volume 31, Issue 1 , June 2021, , Pages 13-24


  The Dalichai Formation is the first rock unit of the Middle Jurassic in the Alborz sedimentary basin that has occurred in a marine environment. The boundary of the Dalichai formation with Shemshak Formation is erosional unconformable while it is concordant with Lar formation. Due to lithological similarity, ...  Read More

New discovery on Ediacaran fossils from the Kushk Series in Bafq and Behabad regions, Central Iran

Seyed Hamid Vaziri; Mahmoud Reza Majidifard; Marc Laflamme

Volume 28, Issue 112 , August 2019, , Pages 261-268


  The Precambrian Kushk Series in the Bafq and Behabad regions of Central Iran contains a diverse assemblage of latest Ediacaran fossils that showcase a fossil assemblage much more diverse than typically known from the latest Ediacaran systems worldwide. The Kushk Series reaches a thickness of >500 ...  Read More

Deliberation of Cenomanian- Coniacian Boundary based on Biostratigraphic and Lithostratigraphic Studies in Bahregansar Field, Presian Gulf

K. Kiarostami; S. H. Vaziri; B. Noori; S. Allahmadadi; F. Vakilbaghmisheh

Volume 21, Issue 82 , December 2011, , Pages 113-120


  In order to investigate lithostratighraphical and biostratigraphical as well as determination of exact contact between the Sarvak and Ilam formations in oil well X-01 of Bahregansar field thin microscopic sections, final well reports and its illustrative diagram were studied. The Sarvak Formation with ...  Read More

Lithostratigraphy, Microbiostratigraphy and Microfacies of the Ilam Formation in Southwestern Khorram Abad

S.H. Vaziri; D. Jahani; M. Safdari; F. Chegeni

Volume 17, Issue 67 , February 2008, , Pages 124-139


         The Ilam Formation in southwestern Khorram Abad with a thickness of up to 204 meters consists of uniform limestones with Middle Turonian to Early Campanian age which were deposited in a continuous sedimentation process. In this section, the Ilam Formation has continuous ...  Read More