Abstract: This study includes the prilimary results of the Gürlek-Kocabaş (Denizli) and Örtülü (Afyon) travertinesprecipitated within the similar depositional systems and the comparative investigation of the sedimentary processesand depositional periods of these terrestrial carbonates. The investigated areas are located within the NW-SEtrending Denizli Graben (Gürlek-Kocabaş) and NE-SW trending Acıgöl Graben (Örtülü) that adjacent to each otherwhich started to develop due to the extentional tectonic regime in the neotectonic period in SW-Turkey.Gürlek-Kocabaş travertines are deposited in shallow-pool like depression depositional system where the marshpool and flat-pool facies are observed. On the other hand Örtülü travertines have been determined in this studywhere could be precipitated in higher energy environment like slope depositional system and also in lower energyenvironment like shallow-pool depositional system. While the lateral expanded of the Gürlek-Kocabaş travertines ishundreds of meters, the Örtülü travertines continued few hundred meters and then they changed to the fluvial tufas towards Acigöl Graben. Palaeosol levels are significantly observed in two travertine deposits. According to thefirst pollen data, the existence of pollens (Pinaceae, Cedrus, Artemisia, Quercus), which are generally belonging toherbaceous and gymnosperms plants, are important data of climatic fluctuation. The presence of the Artemisia formin the investigated samples suggests the cool and arid climatic conditions in the precipitation of these terrestrialcarbonates.According to radiometric dating, two travertine deposits are precipitated in Middle-Late Pleistocene. In this studyis also determined that Gürlek-Kocabaş travertines continued to precipitate until 85 ka but Örtülü travertineaccumulations ceased approximately 308ka ago.