BIOSTRATIGRAPHY AND BIOFACIES OF THE DEVONIAN DEPOSITS OF THE KUH-E-SHORAB SECTION (SOUTHWEST DAMGHAN) BASED ON CONODONT FAUNA

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HOVEIDA MEHDI; BAHRAMI ALI; YAZDI MEHDI

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Journal: JOURNAL OF STRATIGRAPHY AND SEDIMENTOLOGY RESEARCHES Year:2016 | Volume:32 | Issue:3 (64) Page(s): 75-92

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Title

BIOSTRATIGRAPHY AND BIOFACIES OF THE DEVONIAN DEPOSITS OF THE KUH-E-SHORAB SECTION (SOUTHWEST DAMGHAN) BASED ON CONODONT FAUNA

Author(s)

HOVEIDA MEHDI | BAHRAMI ALI | YAZDI MEHDI | Issue Writer Certificate

Keywords

DEVONIANQ2

BAHRAM FORMATIONQ2

SHORAB SECTIONQ1

BIOSTRATIGRAPHYQ2

BIOFACIESQ2

SOUTHWEST DAMGHANQ1

Abstract

The studied section located in the Djam-Semnan area 55 kms south west Damghan, at the vicinity of the Amrovan rail way station, in the northern flank of Shorab unassymetric anticline.The section is 440 meters thick, including limestone, dolomitic limestone and sandstone with rich fossils contents (e.g.: trilobite, coral, brachiopod, crinoid segments and vertebrate remains). The lower boundary is covered with the recent alluvial and the upper boundary disconformably overlain by the red marls and sandstones of the Permian Dorud formation. In order to determine BIOSTRATIGRAPHY and bifacies of the deposits of BAHRAM FORMATION in SHORAB SECTION, twenty five samples (4-6 kgs) were collected and processed with conventional actic/formic acid. Nineteen samples were prolific and totally yielded 340 conodont elements. The extracted conodont elements mainly separated out of the carbonate units. Thirty-one species belong to four genera (Polygnathus, Icriodus, Pelecysgnathus and Ancyrodella) were discriminated as: Icriodus excavatus, I. expansus, I. cedarensis, I.subterminus, I. iowaensis, I. alternatus, I. tafilaltensis, I. brevis, I. cf.expansus, I. sp., Polygnathus brevilaminus, Poly.angustidiscus, Poly. pollocki, Poly. cf. webbi, Poly.aspelundi, Poly. politus, Poly. alatus, Poly. webbi, Poly. cf. olgae, Poly.dubius, Poly. xylus, Poly. zinaidae, Poly. sp., Pelekeygnathus inclinathus, Pele. serradentatus, Pele. sp., Ancyrodella pristina, Acny. cf.pristina, Ancy. aff. binodosa, Ancy. sp. Based on the frequency and distribution of the collected elements Late Givetian to Early Famennian age were suggested to the studied interval. Conodonts BIOFACIES (icriodid-polygnathid) confirm the deposition of the BAHRAM FORMATION of the SHORAB SECTION in the shallow carbonate condition.

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APA: Copy

HOVEIDA, MEHDI, BAHRAMI, ALI, & YAZDI, MEHDI. (2016). BIOSTRATIGRAPHY AND BIOFACIES OF THE DEVONIAN DEPOSITS OF THE KUH-E-SHORAB SECTION (SOUTHWEST DAMGHAN) BASED ON CONODONT FAUNA. JOURNAL OF STRATIGRAPHY AND SEDIMENTOLOGY RESEARCHES, 32(3 (64)), 75-92. SID. https://sid.ir/paper/358884/en

Vancouver: Copy

HOVEIDA MEHDI, BAHRAMI ALI, YAZDI MEHDI. BIOSTRATIGRAPHY AND BIOFACIES OF THE DEVONIAN DEPOSITS OF THE KUH-E-SHORAB SECTION (SOUTHWEST DAMGHAN) BASED ON CONODONT FAUNA. JOURNAL OF STRATIGRAPHY AND SEDIMENTOLOGY RESEARCHES[Internet]. 2016;32(3 (64)):75-92. Available from: https://sid.ir/paper/358884/en

IEEE: Copy

MEHDI HOVEIDA, ALI BAHRAMI, and MEHDI YAZDI, “BIOSTRATIGRAPHY AND BIOFACIES OF THE DEVONIAN DEPOSITS OF THE KUH-E-SHORAB SECTION (SOUTHWEST DAMGHAN) BASED ON CONODONT FAUNA,” JOURNAL OF STRATIGRAPHY AND SEDIMENTOLOGY RESEARCHES, vol. 32, no. 3 (64), pp. 75–92, 2016, [Online]. Available: https://sid.ir/paper/358884/en

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