فهرست مقالات Carboniferous

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  1 - Biostratigraphy of Devonian-Carboniferous boundary in Tuyeh-Darvar section, north of Iran
  Mohammad Taghi Najjarzadeh Ali Reaza Ashouri Mehdi Yazdi Ali Bahrami
  10.30495/ijes.2020.673332
  Devonian-Carboniferous boundary is not clear in the Eastern Alborz Mountains. In the current study Tuyeh-Darvar section with about 170 m, thickness is selected. In this investigation, the primary goal is revision of Devonian/Carboniferous Boundary (known as DCB) and the چکیده کامل

  Devonian-Carboniferous boundary is not clear in the Eastern Alborz Mountains. In the current study Tuyeh-Darvar section with about 170 m, thickness is selected. In this investigation, the primary goal is revision of Devonian/Carboniferous Boundary (known as DCB) and the other goal is the redefinition of the DCB as a famous necessity (based on ICS program in 2008 for defining the boundary and to find a new GSSP). According to Conodont data from acid-leaching 53 carbonate samples(by acid acetic) that obtained from Late Devonian and Early Carboniferous deposits in this section, and based on standard conodont Zonation 6 Zone are recognized;1. Bi.ultimus/or Si.praesulcata Zone, 2. Pr.kockeli /or Si.sulcata Zone, 3. Si.duplicata to Si.sandbergi bio interval, 4. Si.crenulata Zone, 5.Gnathodus-P.inornatus Zone, and 6.Ps.multistriatus Zone. Considering to the Conodont Zones above mentioned, Conodont faunas and other evidences, in the Tuyeh-Darvare section the DCB, is located within cream to grey silt stone beds, which are lies between K6 limestone and K8 dark carbonate beds (about 7.10 m above the base of recent studied section). پرونده مقاله
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  2 - Presentation of a Rich fauna Athyrididae from the Late Devonian and Early Carboniferous North of Damghan (Jeyrud and Mobarak Formations)
  Babak Aghababalu Mohammad Jafarian
  Athyrididae belong to one of the important Brachiopod groups, typical of Upper Devonian & Early Carboniferous sediments. This family has a world-wide diversification with many species. This study for the first time is on fossils of the Jeyrud and Mobarak Formations چکیده کامل

  Athyrididae belong to one of the important Brachiopod groups, typical of Upper Devonian & Early Carboniferous sediments. This family has a world-wide diversification with many species. This study for the first time is on fossils of the Jeyrud and Mobarak Formations in Balast Mine (North East Railway Co.). The sediments have a rich fauna of Corals, Crinoids and other groups of Brachiopods. Compared with other sections in Iran, this section has the richest fauna of athyris. (Samples are in Azad University, branch of Izeh). According to this study we recognized. - Athyris globolina (Waagn 1884).- Cleiothyridina coloradensis (Girty 1900).- Cleiothyridina coloradensis intermedia (Chao 1938).- Cleiothyridina davidi (Chao 1938).- Cleiothyridina kusbassica (Benznosova 1963).- Cleiothyridina (Leiothycridina) okensis (Grunt 1980).- Cleiothyridina orbicularis (Chao 1938).- Cleiothyridina transversa (Stainbrook 1947).- Cleiothyridina transversa geirudensis (Assereto 1962).- Composita ambigua (Soworby 1839).- Composita megala (Tolmacher 1924). پرونده مقاله
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  3 - Study of the Bryozoa of the lower part of the Jamal Formation in Bazman region (Sarab section)
  Hamed Yarahmadzahi Andrej Ernst
  To study the Bryozoa and the stratigraphy of Permian rocks in the Bazman region an east-west stratigraphic section was studied. The Sarab section, which takes its name from the Sarab River, is located on the southern slope of the Bazman Volcano. The rocks of this sectio چکیده کامل

  To study the Bryozoa and the stratigraphy of Permian rocks in the Bazman region an east-west stratigraphic section was studied. The Sarab section, which takes its name from the Sarab River, is located on the southern slope of the Bazman Volcano. The rocks of this section with a thickness of 202 m. are divided into 7 informal rock units, where the lower boundary has discordance with carboniferous sediments, and the upper boundary is faulted. Based on the microfossils and the Bryozoa, the age of the lower part of the Jamal Formation is Bolorian. In this study, three genera and species were identified, one of which has been reported for the first time in Iran. Fistulipora timorensis ( Bassler 1929), * Strablascopora cf. germana (Bassler 1929) *Filiramoporina sp., Streblotrypa ( Streblascopora)marmionensis (Etheridge 1926). پرونده مقاله