Gypsum karst and its evolution east of Hafik (Sivas, Turkey)

DOĞAN U., Ozel S.

GEOMORPHOLOGY, cilt.71, sa.3-4, ss.373-388, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 71 Sayı: 3-4
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.geomorph.2005.04.009
  • Dergi Adı: GEOMORPHOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.373-388
  • Anahtar Kelimeler: gypsum karst, dissolution doline, collapse doline, Polje, mature karst, Hafik, Sivas, Turkey, MIOCENE GYPSUM, MIDDLE MIOCENE, EBRO BASIN, SUBSIDENCE, KARSTIFICATION, FEATURES, DOLINES, EXAMPLE
  • Ankara Üniversitesi Adresli: Evet

Özet

Sivas and its surroundings is the most important gypsum karst terrain in Turkey with a massive Lower Miocene gypsum formation 750 m thick. The region east of Hafik has a wide variety of well developed karstic features such as karrens, dissolution dolines, collapse dolines, blind valleys, karstic springs, swallow holes, caves, unroofed caves, natural bridges, gorges and poljes. The karstification started in the Early Pliocene. The piezometric level to the east of Hafik has lowered at least 200 m since the Early Pliocene and 90-100 m since the Early Pleistocene. There is a youthful karst (doline karst) on the Higher Plateau (1520-1600 m) and a mature karst on Lower Plateau (1315-1420 m). The mature karst evolved in two stages, first stage where excessively karstic paleovalleys, uvalas and collapse dolines appear and the second stage where poljes, collapse dolines and degraded collapse dolines dominated. (c) 2005 Elsevier B.V All rights reserved.