alluvial terrace

alluvial terrace

[ə′lüv·ē·əl ′ter·əs]
(geology)
A terraced embankment of loose material adjacent to the sides of a river valley. Also known as built terrace; drift terrace; fill terrace; stream-built terrace; wave-built platform; wave-built terrace.
References in periodicals archive ?
The bedrock on dam site composes of sequences of marl, mudstone with reddish brown and gray sandstone with silty-marl and greenish silt related from upper red formation (URF), while the abutments covered with old alluvial terrace.
5 meters beneath the coarse grains of alluvium while in abutments, it may be found beneath the slope washes of old alluvial terraces, while it is underlying the old alluvial terraces beyond the contour of 2160 masl [11].
The mound known as Moghul Ghundai (Figure 4) is one of several early settlements in the Zhob Valley, and is situated at the junction between an alluvial fan and an alluvial terrace that is being incised by the Zhob River.
Three valley fill and four alluvial terrace units are recognized from Holocene and late Pleistocene sediments in the lower Nueces River valley where this river is entrenched in the late Pleistocene Beaumont Formation.
EPTISA's investigation found no relationship between factors such as seismic activity, blasting or fluid filtration in the alluvial terrace and the process leading to the dam failure.
These east- to- west mountains have rivers going in the same direction and have formed alluvial terraces that are treasured when producing vineyards.
He is one of the most renowned and innovative forces in South African alluvial diamond mining, having spent his whole career in the alluvial terraces of the Middle Orange and Vaal Rivers.
A study by the United Nations in the 1980s and a follow up study by the SYSMIN I project in late 1990's, conclusively shows the presence of alluvial gold in gravels at or near the bottom of ancient alluvial terraces.
The chronology and stratigraphy of the alluvial terraces of the River Dane valley, Cheshire, NW England, Earth Surface Processes and Landforms 15: 717-37.
The diamondiferous gravels form part of elevated alluvial terraces which continuously border both banks of the river occupying the central part of the property.
Under the heading "Future Developments", the poster notes "The Indian River alluvial terraces represent a previously unrecognized, undervalued resource, with significant economic values of gold.