List of Articles Late Triassic

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  1 - Cruziana ichnofacies from Nayband Formation (Late Triassic) in the Parvadeh section, Southwest Tabas, East central Iran
  Nasrollah Abbassi Mohammad ghavidel Morteza Yosefi Navid Navidi Izad
  Nayband Formation is composed of sandstone, coal bearing shales, siltstone, and fossiliferous limestone in the southwest Tabas section, east central Iran. In this section, it is 1410 m in thickness and Late Triassic in age. A divers trace fossils have been found in the More

  Nayband Formation is composed of sandstone, coal bearing shales, siltstone, and fossiliferous limestone in the southwest Tabas section, east central Iran. In this section, it is 1410 m in thickness and Late Triassic in age. A divers trace fossils have been found in the middle parts of sequence as 400-600 m. These trace fossils include Lockeia isp., Palaeophycus tubularis, Palaeophycus striatus, Planolites beverleyensis, Rhizocorallium isp., Rosselia isp., and cf. Treptichnus isp. This ichnoassemblage is attributable to Cruziana ichnofacies with presence of Lockeia isp., Rhizocorallium isp., and, Rosselia isp. This part of Nayband Formation was deposited in low energy conditions below fair-weather wave base. Manuscript profile
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  2 - Paleoclimatic and paleogeographic signatures in the upper Triassic beds of Shemshak group in Central Alborz
  Mohammad Reza Naiji
  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this stud More

  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this study include: 10 point counting of sandstones, 13 main oxide analyses, 8 species of plant fossils and 4 genuses of palinomorphs. Lithological and geochemical data were restricted to the Late Triassic deposits. Important events of the Late Triassic such as: Late Norian and Middle Rhaetian droughts were revealed by the presence of gypsum beds. This study indicates that lithological signatures are clearly consistent with the mentioned global event and this tracer can be a good basis for controlling other age-related paleontological data. Comparison of the Alborz and Siberian plant fossils indicated that the study area did not have significant differences compared to more northern regions such as Siberia. The investigated palinomorphs indicated that most of them are hygrophytic and mesophytic and some of them had more well-known origin which belonged to some ferns. The point counting data revealed that the source area of the sediments experienced dry to semi-humid climates. This study also confirms that the Alborz region was part of Eurasia, due to the Eo-Cimmerian orogenic event based on recognized plant fossils. Manuscript profile
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  3 - Paleoclimatic and paleogeographic signatures in the upper Triassic beds of Shemshak group in Central Alborz
  Mohammad Reza Naiji Iraj Maghfori-Moghaddam Mahboubeh Hooseni-barzi Bahman Soleimany
  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this stud More

  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this study include: 10 point counting of sandstones, 13 main oxide analyses, 8 species of plant fossils and 4 genuses of palinomorphs. Lithological and geochemical data were restricted to the Late Triassic deposits. Important events of the Late Triassic such as: Late Norian and Middle Rhaetian droughts were revealed by the presence of gypsum beds. This study indicates that lithological signatures are clearly consistent with the mentioned global event and this tracer can be a good basis for controlling other age-related paleontological data. Comparison of the Alborz and Siberian plant fossils indicated that the study area did not have significant differences compared to more northern regions such as Siberia. The investigated palinomorphs indicated that most of them are hygrophytic and mesophytic and some of them had more well-known origin which belonged to some ferns. The point counting data revealed that the source area of the sediments experienced dry to semi-humid climates. This study also confirms that the Alborz region was part of Eurasia, due to the Eo-Cimmerian orogenic event based on recognized plant fossils. Manuscript profile
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  4 - Paleoclimatic and paleogeographic signatures in the upper Triassic beds of Shemshak group in Central Alborz
  Mohammad Reza Naiji Iraj Maghfori-Moghaddam Mahboubeh Hooseni-barzi Bahman Soleimany
  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this stud More

  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this study include: 10 point counting of sandstones, 13 main oxide analyses, 8 species of plant fossils and 4 genuses of palinomorphs. Lithological and geochemical data were restricted to the Late Triassic deposits. Important events of the Late Triassic such as: Late Norian and Middle Rhaetian droughts were revealed by the presence of gypsum beds. This study indicates that lithological signatures are clearly consistent with the mentioned global event and this tracer can be a good basis for controlling other age-related paleontological data. Comparison of the Alborz and Siberian plant fossils indicated that the study area did not have significant differences compared to more northern regions such as Siberia. The investigated palinomorphs indicated that most of them are hygrophytic and mesophytic and some of them had more well-known origin which belonged to some ferns. The point counting data revealed that the source area of the sediments experienced dry to semi-humid climates. This study also confirms that the Alborz region was part of Eurasia, due to the Eo-Cimmerian orogenic event based on recognized plant fossils. Manuscript profile
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  5 - Paleoclimatic and paleogeographic signatures in the upper Triassic beds of Shemshak group in Central Alborz
  Mohammad Reza Naiji Iraj Maghfori-Moghaddam Mahboubeh Hooseni-barzi Bahman Soleimany
  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this stud More

  Late Triassic deposits of Shemshak Group in Emarat section at about 30 km south of Amol and Emamzadeh Hashem section and about 50km north east of Tehran in Central Alborz have been studied for some paleoclimatic and paleogeographic indicators. The data used in this study include: 10 point counting of sandstones, 13 main oxide analyses, 8 species of plant fossils and 4 genuses of palinomorphs. Lithological and geochemical data were restricted to the Late Triassic deposits. Important events of the Late Triassic such as: Late Norian and Middle Rhaetian droughts were revealed by the presence of gypsum beds. This study indicates that lithological signatures are clearly consistent with the mentioned global event and this tracer can be a good basis for controlling other age-related paleontological data. Comparison of the Alborz and Siberian plant fossils indicated that the study area did not have significant differences compared to more northern regions such as Siberia. The investigated palinomorphs indicated that most of them are hygrophytic and mesophytic and some of them had more well-known origin which belonged to some ferns. The point counting data revealed that the source area of the sediments experienced dry to semi-humid climates. This study also confirms that the Alborz region was part of Eurasia, due to the Eo-Cimmerian orogenic event based on recognized plant fossils. Manuscript profile
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  6 - Plant macrofossiles of the Laleband formation (Late Triassic), Ramsar coal-bearing region, Northern Iran
  JAVAD SAADATNEJAD
  20.1001.1.17357128.1401.16.62.2.1
  The Shemshak Group is well-exposed in Ramsar coal-bearing region and consists of four formations; Ekrasar, Laleband, Kalariz and Javaherdeh. The Laleband Formation lies conformably and gradationally on top of Ekrasar formation and its upper contact is conformable and sh More

  The Shemshak Group is well-exposed in Ramsar coal-bearing region and consists of four formations; Ekrasar, Laleband, Kalariz and Javaherdeh. The Laleband Formation lies conformably and gradationally on top of Ekrasar formation and its upper contact is conformable and sharp under Kalariz formation. It contains scattered plant macrofossils of Norian-Rhaetian age. The studied section contains well-preserved and scattered plant macrofossils belonging to three orders as Equisetales, Filicales and Pinales. Based on the occurrence of Neocalamites sp. cf. N. carcinoides, Dictyophyllum sp. cf. D. exile, Clathropteris meniscoides and Cycadocarpidium erdmani and stratigraphic position of fossil bearing layers, Late Norian – Early Rhaetian age is suggested for the studied beds. Manuscript profile