scholarly journals Investigation of the Silak Section Filyschoid Deposits based on Calcareous Nannofossils and Comparison with Shushud Section and Sarayan Section (East Lut Block)

2020 ◽  
Vol 5 (2) ◽  
pp. 159-174
Author(s):  
Farah Jalili ◽  
◽  
Marziyeh Notghi Moghaddam ◽  
Farah Hadavi ◽  
◽  
...  
Keyword(s):  
Calcareous Nannofossils ◽  
Lut Block

scholarly journals Biostratigraphy of Baghamshah Formation based on calcareous nannofossils in the Southwest Tabas, Iran

2021 ◽  
Vol 24 (3) ◽  
pp. 165-178
Author(s):  
Azadeh Bordbar ◽  
Fatemeh Hadavi ◽  
Abbas Ghaderi ◽  
Marziyeh Notghi Moghaddam
Keyword(s):  
Central Iran ◽  
Calcareous Nannofossils ◽  
The West ◽  
Lithostratigraphic Unit ◽  
Lut Block ◽  
Sedimentary Cycle ◽  
Taxonomic Studies

The Tabas Block is part of the Central Iran microcontinent, located between the Lut Block in the East and the Yazd Block in the West. The Baghamshah Formation is the second lithostratigraphic unit from the sedimentary cycle of the Magu Group and the Baghamshah Subgroup in the Jurassic of Tabas Block. This formation is conformably underlaid with the grey pisoidal limestones of the Parvadeh Formation and overlaid with the Pectinid limestones of the Kamar-e-Mehdi Formation (Esfandiar Subgroup). In this research, the biostratigraphy of the Baghamshah Formation in the Rizu and Kamar-e-Mehdi sections, based on calcareous nannofossils, is examined. The thickness of the Baghamshah Formation in the Rizu section is 270 m (mostly including marl and green shales with intercalation of limestones and calcareous sandstones), and in the Kamar-e- Mehdi section is 236 m (composed of gypsiferous marly shales, marl, marly shales and alternation of marl-shale with limestones and calcareous sandstones). According to the taxonomic studies in the Rizu section, 52 species belong to 24 genera, and in the Kamar-e-Mehdi section, 45 species belong to 23 genera of calcareous nannofossils. Based on index calcareous nannofossils, the CC1, CC2, CC3, and CC4 biozones established by Sissinghh in both sections were determined. It is mentioned that CC5 biozone only occur in Kamar-e-Mehdi section. According to the identified biozones, the suggested age of the Baghamshah Formation is early Berriasian–early Hauterivian in the Rizu section, and early Berriasian–late Hauterivian in the Kamar-e-Mehdi section. Keywords: biostratigraphy, Baghamshah, calcareous nannofossils,Tabas, Iran.

scholarly journals Auriferous sulfides from Hired gold mineralization, South Birjand, Lut block, Iran

2010 ◽  
Vol 105 (4) ◽  
pp. 167-174 ◽  
Author(s):  
Hassan ESHRAGHI ◽  
Ebrahim RASTAD ◽  
Kamran MOTEVALI
Keyword(s):  
Gold Mineralization ◽  
Lut Block

scholarly journals High resolution integrated microbiostratigraphy of the Lower Jurassic (late Pliensbachian–early Toarcian) of central Italy

1998 ◽  
Vol 17 (2) ◽  
pp. 153-172 ◽  
Author(s):  
Raffaella Bucefalo Palliani ◽  
Emanuela Mattioli
Keyword(s):  
High Resolution ◽  
Evolutionary History ◽  
Central Italy ◽  
Lower Jurassic ◽  
High Potential ◽  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
Dinoflagellate Cyst ◽  
History Of ◽  
Global Events

Abstract. The integrated use of calcareous nannofossil and dinoflagellate cyst events in a study of the late Pliensbachian–early Toarcian interval in central Italy has yielded a high resolution biostratigraphy. The use of both the first and last occurrences of selected taxa belonging to the two phytoplankton groups allows the dating of the sediments with a very refined detail, even when lithologies are unfavourable to the preservation of one fossil group. The evolutionary history of calcareous nannofossils and dinoflagellate cysts during the early Jurassic and its links with global events are responsible for the high potential of this integrated biostratigraphy.

Calcareous Nannofossils from the La Barca Formation (Paleocene/Eocene Boundary), Tierra Del Fuego, Argentina

Ameghiniana ◽  
2017 ◽  
Vol 55 (2) ◽  
pp. 223 ◽  
Author(s):  
Erika L. Bedoya Agudelo ◽  
Eduardo B. Olivero ◽  
Andrea Concheyro ◽  
Pablo J. Torres Carbonell ◽  
Daniel R. Martinioni
Keyword(s):  
Tierra Del Fuego ◽  
Calcareous Nannofossils
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