Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 562771
Title Early Pleistocene River Terraces of the Gediz River, Turkey : The role of faulting, fracturing, volcanism and travertines in their genesis
Author(s) Maddy, D.; Veldkamp, A.; Demir, T.; Aytaç, A.S.; Schoorl, J.M.; Scaife, R.; Boomer, I.; Stemerdink, C.; Schriek, T. van der; Aksay, S.; Lievens, C.
Source Geomorphology 358 (2020). - ISSN 0169-555X
DOI https://doi.org/10.1016/j.geomorph.2020.107102
Department(s) PE&RC
Soil Geography and Landscape
Publication type Refereed Article in a scientific journal
Publication year 2020
Keyword(s) Early Pleistocene, Turkey - Landscape Evolution - River terraces - Travertine
Abstract

Reconstructing and interpreting past hydrological system changes from the Quaternary sediment-landform record presents many challenges especially when trying to establish causality. In such circumstances attempting to isolate individual drivers is perhaps unrealistic and thus inferences are made with respect to the combined influence of multiple controls and constraints. In this paper we seek to interpret the landscape responses recorded in the sediment-landform record of the Early Pleistocene Gediz valley, western Turkey, within the context of interacting geodynamic and hydrodynamic system changes. Our earlier work on the Gediz sequence established the presence of a rich fluvial archive constrained by a comprehensive geochronology from overlying lava flows. Repeated damming of the Gediz valley floor and consequent re-routing of water flow, testifies to a direct connection between fluvial activity and volcanism. This volcanism has been linked to regional tectonic extension with regional uplift promoted as a major driver of the progressive river incision of the Gediz River over the Quaternary. This incision has been punctuated by periods of deposition dictated by sediment and water budgets controlled principally by fluctuating climate and consequent vegetation change. Recently however, the significance of more local fault movements and fracturing has been recognised and here we examine and attempt to quantify these geodynamics in greater detail. In addition, we examine and describe, for the first time, extensive associated travertine deposits. Isotopic analysis of these travertines confirms their thermogenic origin and directly links their creation to the faulting/fracturing, volcanism and the recycling of calcium-rich groundwater. The formation of mounds and sheets extend onto their contemporary valley floors, thus directly connecting the fluvial and travertine archives and allowing linkage between surface and subsurface hydrological change. By utilising both the fluvial and travertine archives a more complex picture of landscape evolution emerges. The youngest terraces (

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