CLIMATIC AND TECTONIC EFFECTS ON TERRACE FORMATION DURING THE LATE QUATERNARY IN THE UPPER YESILIRMAK VALLEY, NORTHERN TURKEY
Küçük Resim Yok
Tarih
2017
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Comitato Glaciologico Italiano
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study was carried out in the upper course of the Yesilirmak River, which is one of the biggest rivers reaching the Black Sea, northern Turkey. We distinguished two fluvial terraces and dated them using OSL technique. T2 is the young terrace and situated at similar to 11 m above the actual river (at 620 m asl). T1 is the youngest and situated at similar to 5-6 m above the actual river (at 605 m asl). From the lower dated terrace (T1) was dated 6735 ka, 5277 ka and 4226 ka, respectively. From the higher dated terrace (T2) was dated 24,139 ka, 22,008 ka, 12,694 ka and 11,307 ka, respectively. While the higher terrace aggraded during three important cold periods (Heinrich 2 event (H2), the Last Glacial Maximum (LGM) and the Younger Dries (YD), the lower terrace (the present floodplain) aggraded during the Holocene Climatic Optimum (HCO). The river incised during transition from the LGM to Holocene transition and after the HCO. the Yesilirmak has incised its valley similar to 11 m during the last 24 ka. These results indicate an average incision rate of 1.25 mm/yr (1.25 m/ka).
Açıklama
Anahtar Kelimeler
Climate Change, Terrace, Incision, Late Quaternary, Yesilirmak River
Kaynak
Geografia Fisica E Dinamica Quaternaria
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
40
Sayı
2
