Cosmogenic Cl-36 geochronology of late Quaternary glaciers in the Bolkar Mountains, south central Turkey

Ciner A., Sarıkaya M. A.

QUATERNARY GLACIATION IN THE MEDITERRANEAN MOUNTAINS, vol.433, pp.271-287, 2017 (Scopus) identifier


We present the first quantitative late Quaternary cosmogenic Cl-36 glacial geochronology from the Bolkar Mountains of south central Turkey. Thirty samples were collected from three glaciated valleys. The geomorphological investigations indicate that the palaeoglaciers deposited their moraines between 3200 and 2200 m above sea level on the north-and south-facing valleys. We recognize four glacial periods, with the oldest one dating back to about 46.0 +/- 7.0 ka in the northern Karagol Valley. Later, glaciers reached their maximum positions (similar to 5.5 km from cirque to snout) by 18.9 +/- 3.3 ka (during the local Last Glacial Maximum; LGM) in the Karagol Valley. Late-glacial moraines were dated to between 15.2 +/- 1.6 and 12.6 +/- 2.3 ka in both northern Alagol and southern Elmali Valleys, respectively. The final deglaciation in the mountain commenced in the early Holocene (9.0 +/- 0.9 ka in the Karagol Valley; 8.5 +/- 1.8 ka in the Elmali Valley). A contemporaneous outwash plain dates to 8.4 +/- 1.0 ka at the outlet of the Alagol Valley. Our results agree well with the glacial chronologies obtained from other Turkish and Mediterranean mountains.