Middle Triassic radiolarians from the Southeastern Pamirs (Republic of Tajikistan) |
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| Affiliation: | 1. Istituto per l''Ambiente Marino Costiero (IAMC), Consiglio Nazionale delle Ricerche, Calata Porta di Massa, Interno Porto di Napoli, 80133 Naples, Italy;2. Istituto Nazionale di Geofisica e Vulcanologia (INGV), Via della Fagiola 32, 56126 Pisa, Italy,;3. Università degli Studi “Parthenope” di Napoli, Dipartimento di Scienze per l''Ambiente, Naples, Italy;4. Istituto Scienze Marine, ISMAR — CNR, Consiglio Nazionale delle Ricerche, Via Gobetti 101, 40129 Bologna, Italy;5. Università degli Studi di Padova, Dipartimento di Geoscienze, Padova, Italy;1. Natural History Museum, University of Oslo, 1172 Blindern, 0316 Oslo, Norway;2. Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, 00–818 Warszawa, Poland;3. Department of Palaeobiology, Swedish Museum of Natural History, P.O. Box 50007, SE-104 05 Stockholm, Sweden;4. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom;1. Departamento de Ciencias de la Tierra, Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain;2. Instituto Universitario de Ciencias Ambientales, Universidad de Zaragoza, Zaragoza, Spain;3. PetroStrat Ltd., Tan-y-Graig, Parc Caer Seion, Conwy, Wales LL32 8FA, UK;4. Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, 50121 Firenze, Italy;5. TNO Petroleum Geoscience, Princetonlaan 6, 3584 CB Utrecht, The Netherlands |
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| Abstract: | Triassic radiolarians were studied from a limestone/chert succession of the Dzhangisu and Boztere formations, Southeastern Pamirs, Republic of Tajikistan. The middle part of the Dzhangisu Formation is characterized by a Late Anisian assemblage with Eptingium nakasekoi Kozur and Mostler, Archaeospongoprunum bispinosum Kozur and Mostler, A. mesotriassicum mesotriassicum Kozur and Mostler, Paroertlispongus multispinosus Kozur and Mostler, P. rarispinosus Kozur and Mostler and Hozmadia rotunda (Nakaseko and Nishimura) that belongs either to the upper part of the Tetraspinocyrtis laevis Zone or to the Spongosilicarmiger transitus Zone (Kozur, 2003). The lowermost part of the Boztere Formation is characterized by a Late Ladinian assemblage with Muelleritortis cochleata (Nakaseko and Nishimura), M. expansa (Kozur and Mostler), Spongoserrula rarauana Dumitrica that corresponds to the M. cochleata Zone. Pamirian localities have a transitional position between the Western Tethys (Alpine–Mediterranean region) and the Eastern Tethys–Pacific junction (Southern China and Thailand). The assemblages are Tethyan in affinity. |
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| Keywords: | Radiolaria Middle Triassic Stratigraphy Pamirs Tajikistan Radiolaires Trias moyen Stratigraphie Pamir Tadjikistan |
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