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Late Middle Jurassic (Late Bathonian-early Callovian) radiolarian cherts from the Neotethyan Bornova flysch zone, Spil Mountains, Western Turkey

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Abstract

Alternating radiolarian cherts and mudstones associated with basaltic lavas occur in a olistolith within the Late Cretaceous Bornova Flysch in W Anatolia. Cherts yielded diverse and moderately preserved, Nassellaria-dominated radiolarian faunas of late Bathonian-early Callovian age. Associated volcanic rocks are geochemically classified as remnants of oceanic seamounts. This is so far the first late Middle Jurassic age from the crust of the Neotethyan Izmir-Ankara Ocean in W Anatolia, and suggests that its spreading started earlier. Similar ages were reported from the Vardar and Meliata-Hallstadt Tethyan oceanic branches in Greece and Serbia, which also opened in Late Triassic but closed earlier.

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Authors and Affiliations

  1. Geological Engineering Department, Hacettepe University, 06532, Beytepe- Ankara, Turkey

    U. Kagan Tekin

  2. Geological Engineering Department, Middle East Technical University, 06531, Ankara, Turkey

    M. Cemal Goncuoglu

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  1. U. Kagan Tekin
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  2. M. Cemal Goncuoglu
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Correspondence to U. Kagan Tekin.

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Published in Russian in Stratigrafiya. Geologicheskaya Korrelyatsiya, 2009, Vol. 17, No. 3, pp. 70–80.

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Tekin, U.K., Cemal Goncuoglu, M. Late Middle Jurassic (Late Bathonian-early Callovian) radiolarian cherts from the Neotethyan Bornova flysch zone, Spil Mountains, Western Turkey. Stratigr. Geol. Correl. 17, 298–308 (2009). https://doi.org/10.1134/S086959380903006X

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