First Chronological Constraints for the High Terraces of the Upper Ebro Catchment
| Autor: | María José González-Amuchastegui, Josep María Parés, Ángel Soria-Jáuregui, Mathieu Duval |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010506 paleontology
Paleomagnetism Stratigraphy Drainage basin Fluvial Structural basin 010502 geochemistry & geophysics 01 natural sciences Paleontology fluvial terraces Aggradation River terraces Earth and Planetary Sciences (miscellaneous) Human evolution 0105 earth and related environmental sciences Earth-Surface Processes geography geography.geographical_feature_category electron spin resonance paleomagnetism Sedimentary basin Ebro River QE640-699 Spain GN281-289 Sedimentary rock Geology |
| Zdroj: | Quaternary; Volume 4; Issue 3; Pages: 25 Quaternary, Vol 4, Iss 25, p 25 (2021) |
| ISSN: | 2571-550X |
| DOI: | 10.3390/quat4030025 |
| Popis: | The Cenozoic sedimentary basins in the Iberian Peninsula show a change from long-term basin infill to incision, a transition that indicates a period of major drainage reorganization that culminated in the throughflow of the networks to the Atlantic and Mediterranean oceans. Both the cause of the transition from aggradation to degradation and the linkages to tectonic, climatic, and geomorphic events hinge on the chronology of the fluvial network incision and excavation of the basin’s sedimentary fills. In this paper, we describe the first chronologic data on the highest fluvial terraces of the upper area of the Ebro River, one of the largest fluvial systems in the Iberian Peninsula, to determine the onset of incision and excavation in the basin. For this purpose, we combine electron spin resonance (ESR) and paleomagnetism methods to date strath terraces found at 140, 90, and 85 m above the current river level. Our results show ages of ca. 1.2 and 1.5 Ma for the uppermost river terraces in the upper Ebro catchment, constraining the minimum age of the entrenchment of the upper Ebro River. |
| Databáze: | OpenAIRE |
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