BIOZONATION OF GEIRUD FORMATION IN THE EASTERN ALBORZ (DAMGHAN REGION) BASED ON THE BRACHIOPODA

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KEBRIAEI ZADEH M.R.

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Journal: GEOSCIENCES Year:2009 | Volume:18 | Issue:71 Page(s): 19-30

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Title

BIOZONATION OF GEIRUD FORMATION IN THE EASTERN ALBORZ (DAMGHAN REGION) BASED ON THE BRACHIOPODA

Author(s)

KEBRIAEI ZADEH M.R. | Issue Writer Certificate

Keywords

BRACHIOPODAQ3

GEIRUD FORMATIONQ3

DAMGHANQ2

EASTERN ALBORZQ2

FAMENNIANQ3

Abstract

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 (Darvar, Simeh- Kuh and Deh- Molla sections) were studied and resulted in recognizing some species that are as follows:Schellwienella sp., Mesoplica sp., Sentosia sp., Schizophoria impressa, Leptagonia sp., Aulacella interlineata, Zaigunrostrum iranicum, Leptocaryorhynchus jamensis, Araratella dichotomians assimulata, Araratella sp., Centrorhynchus charakensis, Megalopterorhynchus chanakchiensis, Paurogastroderhynchus nalivkini, Paurogastroderhynchus bikniensis, Cleiothyridina coloradensis, Cleiothyridina sp., Athyris tau, Composita cf. globosa, Lamellosathyris sp., Cyrtospirifer sergunkovae, Cyrtospirifer sp., Cyrtiopsis graciosa chakhaensis, Cyrtiopsis lapparenti, Prospira struniana, Prospira lapparenti, Rigauxia cyrtinaeformis, Rigauxia crassiplicatus, Dichospirifer thylakistoides, Eobrachythyris sp., Toryniferella echinulata, Cryptonella sp.Based on the above mentioned BRACHIOPODA an age of Early FAMENNIAN-Late FAMENNIAN can be considered for carbonate part of GEIRUD FORMATION in the these sections.Also, GEIRUD FORMATION in the sections is equivalent with middle and upper parts (with the exception of Rossirhynchus biozone) of GEIRUD FORMATION in the type section (Central Alborz).

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APA: Copy

KEBRIAEI ZADEH, M.R.. (2009). BIOZONATION OF GEIRUD FORMATION IN THE EASTERN ALBORZ (DAMGHAN REGION) BASED ON THE BRACHIOPODA. GEOSCIENCES, 18(71), 19-30. SID. https://sid.ir/paper/32432/en

Vancouver: Copy

KEBRIAEI ZADEH M.R.. BIOZONATION OF GEIRUD FORMATION IN THE EASTERN ALBORZ (DAMGHAN REGION) BASED ON THE BRACHIOPODA. GEOSCIENCES[Internet]. 2009;18(71):19-30. Available from: https://sid.ir/paper/32432/en

IEEE: Copy

M.R. KEBRIAEI ZADEH, “BIOZONATION OF GEIRUD FORMATION IN THE EASTERN ALBORZ (DAMGHAN REGION) BASED ON THE BRACHIOPODA,” GEOSCIENCES, vol. 18, no. 71, pp. 19–30, 2009, [Online]. Available: https://sid.ir/paper/32432/en

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