Late Quaternary glaciations and cosmogenic Cl-36 geochronology of Mount Dedegol, south-west Turkey


KÖSE O., Sarıkaya M. A. , Ciner A. , Candaş A.

JOURNAL OF QUATERNARY SCIENCE, cilt.34, ss.51-63, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 34 Konu: 1
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1002/jqs.3080
  • Dergi Adı: JOURNAL OF QUATERNARY SCIENCE
  • Sayfa Sayıları: ss.51-63

Özet

We present details on the timing of glaciations during the late Quaternary in the western Taurus Mountain Range of Turkey. Twenty-five boulders from prominent moraines in three northern glacial valleys of Mount Dedegol (37.40 degrees N, 31.17 degrees E, 2992 m above sea level, similar to 15 km west of Lake Beysehir) were dated based on cosmogenic Cl-36 surface exposure. The geomorphological mapping of the N-NE-trending Sayacak, Kisbe and Karagol valleys and their in situ produced Cl-36 glacial chronology revealed several glacial episodes during the late Quaternary from (pre-Last Glacial Maximum (pre-LGM) to early Holocene. Pre-LGM glaciations are represented by a push-hummocky moraine complex in the northern Sayacak Valley and dated to 29.7 +/- 2.9 ka. The ages obtained from these hummocky moraines give substantial evidence regarding ice accumulation before the global LGM. In the same valley, glaciers reached their maximum positions at the LGM and deposited lateral moraines at 19.7 +/- 1.6 ka. Lateglacial moraines were dated to between 16.4 +/- 0.7 and 12.0 +/- 1.0 ka in the nearby east-facing Karagol valley. The youngest glacial stages occurred during the Younger Dryas stadial (11.5 +/- 0.8 ka) and early Holocene (9.8 +/- 1.4 ka) in Mount Dedegol.