In the Hazro area of the Turkish border fold zone in SE Anatolia (Fig. 1), the exact position of the Silurian-Devonian (S-D) boundary is still under debate. Biostratigraphic approaches failed up to now (compare Luppold et al., 2012, this meeting: Silurian-Devonian Boundary 2) due to several missing index fossils (e.g. graptolites), revision of index fossils (conodonts) and a partly incomplete distribution of palynomorphs (e.g. chitinozoans and acritarchs). According to the geological information from this area near the north rim of the Arabian plate, the SD boundary should be positioned within the local Upper Dadas Fm. which represents a subunit of the Silurian to Devonian Diyarbarkır Group (Bozdoğan et al, 1987; Fontaine et al., 1980). Based on Acritarch assemblages, the Dadas Fm. is of Wenlockian to Lochkovian age (Bozdoğan and Ertuğ, 1997).


Article metrics loading...

Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error