Results 201 to 210 of about 18,588 (223)

Cosmogenic dating of fluvial terraces, Fremont River, Utah

Earth and Planetary Science Letters, 1997
Absolute dating of river terraces can yield long-term incision rates, clarify the role of climate in setting times of aggradation and incision, and establish the rates of pedogenic processes. While surface exposure dating using cosmogenic 10Be and 26Al would seem to be an ideal dating method, the surfaces are composed of individual clasts, each with ...
James L Repka, Robert S Anderson, Robert C Finkel   +2 more
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The Causes of Fluvial Terraces Inland and Its Implication

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
Terraces in tectonically active mountains and uplands record both tectonic uplift and climatic changes. The author discusses the methods of how to distinguish the role of both tectonic and climatic factors. Fluvial system in inland is a process of reaction between aggradation and incision controlled by tectonic movement or climate changes.
C. Hong, A. Zhisheng, Q. Xiaoke, S. Yougui, F. Chaofeng   +4 more
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Relict fluvial terraces on the Tsondab Flats, Namibia

Journal of Arid Environments, 1979
Within the hyper-arid central dune Namib, the dune-free Tsondab Flats, extending 40 km west from Tsondab Vlei, are characterized by terraced topography incised into a conglomerate-capped red sandstone. The hypothesis is posed that the terraces are fluvial in origin and that they preserve a record of fluvial incision and arid interruption.
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Bedrock fluvial incision and longitudinal profile development over geologic time scales determined by fluvial terraces

1998
Fluvial terraces preserve the history of river incision into bedrock over geologic time scales. In this paper we use terraces and a comparison of terrace longitudinal profiles to stream longitudinal profiles to develop a conceptual model of bedrock fluvial incision in diverse geologic, tectonic, and climatic settings.
Frank J. Pazzaglia, Thomas W. Gardner, Dorothy J. Merritts   +2 more
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Fluvial cut-and-fill terraces record climate oscillations

2020
Using a model of long-term fluvial erosion and sediment transport (Yuan et al., 2019, JGR-SE), we demonstrate and quantify a direct, physical explanation for the relationship between climate oscillations and the formation of fluvial cut-and-fill terraces.
Xiaoping, Yuan, Guerit, Laure, Braun, Jean, Rouby, Delphine, Shobe, Charles   +4 more
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Simulating internal and external controls on fluvial terrace stratigraphy: a qualitative comparison with the Maas record

Geomorphology, 2000
Palaeohydrological studies indicate that the use of sedimentary palaeoclimatic indicators in fluvial sediments still requires rigorous calibration of the climatic controls on the formation of those indicators. An explorative attempt is made using a simulation experiment with the FLUVER2 model.
Veldkamp, A., van Dijke, J.J.
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Late Quaternary fluvial terrace evolution in the main southern Amazonian tributary

CATENA, 2014
Abstract Late Quaternary sedimentary deposits from Amazonian lowlands are important geological archives for understanding the origin, evolution and controls of the largest fluvial drainage basin on Earth. Climate has been most often claimed as the main factor affecting river evolution in this region.
Dilce F. Rossetti, Marcelo C.L. Cohen, Thiago C. Bertani, Ericson H. Hayakawa, Jackson D.S. Paz, Darcilea F. Castro, Yuri Friaes   +6 more
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River terrace development by concurrent fluvial processes and climatic changes

Geomorphology, 1993
Abstract Along the Usui River in central Japan, three well-developed terrace levels are observed. Each terrace is subdivided into two segments: a filltop terrace along the upper reach and a strath terrace along the lower one. Three valley fillings with coarse gravel beds in the upper reach correspond to the last three glacial ages.
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Pleistocene tectonics inferred from fluvial terraces of the northern Upper Rhine Graben, Germany

Tectonophysics, 2007
This study of fluvial terraces of the River Rhine and tributaries aims to search for indications of Pleistocene tectonic activity. The study area includes the northern Upper Rhine Graben (URG), the Mainz Basin and the adjacent Rhenish Massif with the Middle Rhine Valley.
Peters, G., Van Balen, R. T.
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Ultramafic Aridisols on a sequence of fluvial terraces in Baja California

Geoderma Regional, 2019
Abstract Practically all arid ultramafic soils in North America are in Baja California. An arid watershed in Baja California was found to have terraces with soil parent materials dominated by serpentinized peridotite. The soils on a sequence of four fluvial surfaces in the watershed were studied in order to trace the path of serpentine soil ...
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