Reconstructing Early Pleistocene (1.3 Ma) terrestrial environmental change in western Anatolia: Did it drive fluvial terrace formation?

VELDKAMP A., Candy I., JONGMANS A. G., MADDY D., Demir T., SCHOORL J. M., ...Daha Fazla

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, cilt.417, ss.91-104, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 417
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.palaeo.2014.10.022
  • Dergi Adı: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.91-104
  • Anahtar Kelimeler: Red soil, Surface calcrete, Colluvium, Stable isotopes, Palaeoenvironment, Turkey, PALEOENVIRONMENTAL SIGNIFICANCE, VOLCANIC DISRUPTION, GEDIZ RIVER, TURKEY, CLIMATE, PALEOSOLS, GENESIS, RECORD, VARIABILITY, CARBONATES
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

A terrestrial environmental reconstruction of an Early Pleistocene landscape from western Anatolia is presented. The basis of this reconstruction is a sedimentary stack comprising fluvial and colluvial slope deposits. Contained within this stack is a sequence comprising two massive laminar calcretes alternating with three reddish palaeosols. This evolutionary sequence is situated on top of a fluvial terrace staircase capped by a 1.3 Ma (Ar-40/Ar-39 plateau age) lava flow. The micro-morphological properties of the observed calcretes and reddish palaeosols combined with the stable oxygen and carbon isotopic composition of the carbonates suggest the alternation of three stable relatively warm-humid (vegetation rich) and two stable relatively arid-cool (bare surface) cycles. In addition, there is also ample evidence for landscape instability in between these phases causing local soil truncation and slope instability in an open grassland-shrub environment. These landscape instability phases match well with known fluvial incisional phases of the Gediz during this period. This suggests that climate-forced landscape environmental dynamics were of sufficient magnitude to drive fluvial terrace formation of the Early Pleistocene Gediz. (C) 2014 Elsevier B.V. All rights reserved.