An alluvial deposit that forms by accretion inside an expanding loop of a river.
〔地质〕凸岸坝，点沙坝，点滩，曲流沙坝
Example sentencesExamples
Sediment deposited on the inside of the bend forms a point bar.
These mud-shrimp are restricted to the lower intertidal of estuarine mouth areas, on muddy point bars that are in continuous contact with normal marine seawater.
The high I.V. of boxelder in a point bar dominated by cottonwood is an example of such a combination.
Collinson also suggested that the units of low-angle cross-stratified conglomerate record either bar shifting within a braided system or the migration of a point bar in a gravel-bed meandering stream.
Variability in current directions and direct observation of arcuate epsilon cross stratification in mixed mud-sand sequences implies high-sinuosity channels with point bars.
Definition of point bar in US English:
point bar
noun
Geology
An alluvial deposit that forms by accretion on the inner side of an expanding loop of a river.
〔地质〕凸岸坝，点沙坝，点滩，曲流沙坝
Example sentencesExamples
Variability in current directions and direct observation of arcuate epsilon cross stratification in mixed mud-sand sequences implies high-sinuosity channels with point bars.
Sediment deposited on the inside of the bend forms a point bar.
The high I.V. of boxelder in a point bar dominated by cottonwood is an example of such a combination.
These mud-shrimp are restricted to the lower intertidal of estuarine mouth areas, on muddy point bars that are in continuous contact with normal marine seawater.
Collinson also suggested that the units of low-angle cross-stratified conglomerate record either bar shifting within a braided system or the migration of a point bar in a gravel-bed meandering stream.