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Incised and Entrenched Meanders
Incised meanders - In a river, a deep
steep-sided meander formed by the
severe downwards erosion of an existing
meander. There is less rapid uplift of
land, allowing river to shift laterally
across its floodplain. There are several
incised meanders along the middle
course of the River Wye, near Chepstow, Incised meanders of the San Juan River
Gwent.
Entrenched meanders- Symmetrical cross
section, they occur if valley sides are
resistant to erosion, or rapid incision by
the river. Downcutting by a stream in
which the rate of vertical erosion is
greater than the rate of lateral migration
of the river channel; so the meander loop
is preserved as the stream downcuts. Entrenched meanders of the San Juan River at
Goosenecks State Park, Utah.…read more

Slide 2

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River Terraces
They are the remains of former flood
plains that lie far above the extent of
present day flooding as a result of
vertical erosion caused by rejuvenation.
It may also be caused by uplift of the
land, a fall in sea level, or a change in
climate. Rejuvenation causes the river to
gain gravitational potential energy. The
terraces themselves are often made from
fluvial material previously dumped by the
river to create the earlier floodplain.
Terraces at Yellowstone River…read more

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