Upper Permian (Changxingian) radiolarian cherts within the clastic successions of the "Karakaya Complex" in NW Anatolia

Goncuoglu M., Kuwahara K., Tekin U., Turhan N.

TURKISH JOURNAL OF EARTH SCIENCES, vol.13, no.2, pp.201-213, 2004 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 2
  • Publication Date: 2004
  • Journal Indexes: Science Citation Index Expanded, Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.201-213
  • Keywords: Karakaya basin, radiolaria, Changxingian, rifting, NORTHWEST TURKEY, SUBDUCTION, EVOLUTION, AGE


The arkosic sandstones with olistostromes within the "Karakaya Complex" in NW Anatolia to the south of Geyve include a thin layer of green chert with radiolaria. Based on the composition of Albaillellids, the radiolarian assemblage corresponds to the Neoalbaillella ornithoformis assemblage, and its age is assigned to the Changxingian (Late Permian). This is the first finding of synsedimentary radiolarian cherts within the Karakaya units and the indication of latest Permian rifting of the Karakaya basin within the Midian carbonate platform and its pre-Permian basement in the Sakarya Composite Terrane.