Braided Rivers - University of Wyominggeoweb.uwyo.edu/geol2100/Lecture09_EnvironmentRivers.pdf ·...

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Transcript of Braided Rivers - University of Wyominggeoweb.uwyo.edu/geol2100/Lecture09_EnvironmentRivers.pdf ·...

Braided Rivers

Deposits From Braided Rivers

Flood Plain & Valley

A

B

A B

Meandering Rivers

Flow in a meander bend

Stress in a meander bend Grain size in a meander bend

High

High

Low

Low

Larger

Finer

Finer

Point Bar Strata

Point Bar Strata

Ancient Floodplains & Soils

Ancient Channel Fill

Stacked Channel Sands & Floodplain Muds

Lowland Rivers

Architecture of a channel-fill

Organization of strata from an avulsing river