Toe-cut terraces

Larson, Phillip H.; Dorn, Ronald I.; Faulkner, Douglas J.; Friend, Donald A.

doi:10.1177/0309133315582045

Cited by 18 publications

(3 citation statements)

References 99 publications

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“…These toe cuts are formed by lateral erosion of the axial BMR rather than by vertical incision and base-level change in the main river. Also, several studies (Leeder & Mack, 2001;Larson et al, 2015;Giles et al, 2018) in the Basin and Range extensional region (USA) have shown that toe-cuts are an important indicator of high tectonic activity. The smaller alluvial fans are observed at the south margin of the BMG.…”

Section: Modern Alluvial Fans (Qmaf)mentioning

confidence: 99%

The Quaternary landforms of the Büyük Menderes Graben System: the southern Menderes Massif, western Anatolia, Turkey

2020

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We present the first detailed Quaternary landform map of the Büyük Menderes Graben System, located in western Turkey which is one of the most active extensional domains in the world. The main map was produced with a combination of TanDEM-X (12.5 m resolution), Red Relief Image Map, unmanned aerial vehicle, Google Earth images, and multiple fieldworks. The main map is presented at a scale of 1:160,000 although landforms were mapped at a scale of 1:15,000. The ten Quaternary landforms were defined considering their surface morphology and depositional environment. The alluvial fans, river terraces, and floodplains are the most common landforms. The spatial pattern of the alluvial fans and river terraces showed the variable rates of tectonics and surface processes along the strike of the graben system. The distribution of the meander cut-offs and paleo-shorelines imply that Büyük Menderes Graben System is vulnerable to geohazards like flash-flood sedimentation and flood events.

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Section: Modern Alluvial Fans (Qmaf)mentioning

confidence: 99%

The Quaternary landforms of the Büyük Menderes Graben System: the southern Menderes Massif, western Anatolia, Turkey

2020

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“…Las terrazas fluviales de agradación son remanentes de antiguas llanuras aluviales que han quedado elevadas en relación con el río actual y su llanura aluvial. Episodios de incisión y depositación pueden dar lugar a una serie de terrazas de diferentes alturas (Larson et al, 2015) que representan descensos del nivel de base del río vinculados, en general, a cambios climáticos o ascensos tectónicos.…”

Section: Marco Geomorfológico Y Secuencia Estratigráficaunclassified

Investigaciones arqueológicas en la margen norte del valle inferior del río Negro (provincia de Buenos Aires): sitio El Churlaquín

Martínez,

Stoessel,

Flensborg

et al. 2024

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El curso inferior del río Negro ha sido el escenario de exploraciones e investigaciones arqueológicas desde fines del siglo XIX, principalmente en la margen sur. Por el contrario, en la orilla norte (partido de Patagones, provincia de Buenos Aires) no se han llevado a cabo investigaciones arqueológicas. Recientemente se comenzó a prospectar sistemáticamente este sector junto a la costa Atlántica adyacente. Aquí se presentan los resultados preliminares del sitio El Churlaquín relacionados a geoarqueología, cronología, tecnología lítica y cerámica, subsistencia y tafonomía. Se trata de una base residencial de actividades múltiples redundantemente ocupada entre ca. 3700-1500 años AP (última parte del Holoceno medio y Holoceno tardío inicial). Se establecieron comparaciones con sitios estudiados en el curso medio de la cuenca con los cuales presenta una gran similitud. Como ha sido propuesto para este sector, en el área de estudio también se habría producido un uso sostenido de ambientes acuáticos.

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“…The upland of terrace in valley fill is like a fill-cut terrace. The lower remain terrace are cut terraces (Larson et al, 2015).…”

Section: Geomorphology Of Meandering and Low Gradient Landformsmentioning

confidence: 99%

Fluvial Geomorphology During 30 Years of the Mun River, Western Part of Changwat Buriram

Srisunthon

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Mun River is a very crucial right bank tributaries of Mekong River which has been known for its complexity of meandering. Those geomorphology that are effected by river’s movement and a helical flow are changed during a period of time. The various geomorphologies during different times can be interpreted from aerial photos, maps, and satellite images and measure the intensity of change by using geomorphic criteria calculation. The geomorphic criteria which are used to quantify river changes are Sinuosity Index (SI), Radius of Curvature (RC) and Channel Width (W). All these criteria and their relationship were used for further examine about meander geometry. As a consequence, SI of Mun River during 30 years has increasing from 1.5 to 1.8 which means the modern Mun River becomes more sinuous. The value of channel width average is decreasing from 72.81 to 39.45 m by influence of the increasing of flow velocity. The river has migration rate of 0.5 – 1.8 m/y. Normalization in migration rate and bend curvature (RC/W) revealed that erosion rate from 1976 to 2009 has a tendency to depreciate. Moreover, profiling from 3 different locations, it found lithofacies that predominated Mun River are Sh, St and Sl. Every lithofacies are identify in a sandy group. This information can prove that Mun River in study area was eroded from a pure sandy source associate with Mahasarakham formation. Also, the research was carried out by using a geophysical tool, Ground Penetrating Radar (GPR), to unveil the subaerially structure of point bars. The tool is a non- destructive geophysical technique that invented for shallow subsurface survey. Not only it can explore underneath earth without penetrate and drill to the ground but also it can show image and estimates depth of subsurface object. By using magnetic wave (microwave) and reflection theory, GPR allows to record a near-continuous sedimentary structures. 8 GPR survey lines from 2 sites achieved by using 200 MHz antenna attached with an odometer based survey wheel for distance tracking. 8 GPR radar facies were recognized to expose variety of sediment characteristics e.g. channel fills, side bar deposit and sand beded. The results from GPR interpretation indicated the complexity of braided characteristic under point bars. Therefore, it can conclude that point bars have developed from mid-channel bars.

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Toe-cut terraces

Cited by 18 publications

References 99 publications

The Quaternary landforms of the Büyük Menderes Graben System: the southern Menderes Massif, western Anatolia, Turkey

The Quaternary landforms of the Büyük Menderes Graben System: the southern Menderes Massif, western Anatolia, Turkey

Investigaciones arqueológicas en la margen norte del valle inferior del río Negro (provincia de Buenos Aires): sitio El Churlaquín

Fluvial Geomorphology During 30 Years of the Mun River, Western Part of Changwat Buriram

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