Friday, 13 May 2011
There are two types of incised meanders, ingrown and entrenched and they can be found in areas like the Grand Canyon.
:- form when lateral erosion operates too (therefore indicates a more gradual drop in base level) and so the valley floor is deepened which means that the channel only occupies part of it.
:- they have an asymmetrical cross section
:- created, purely, by vertical erosion (their presense indicates a rapid fall in base level) and often form in hard rock areas.
:- they are deep cut and gorge like
they have a symmetrical cross section
:- they can be identified by a break in slope and so are often marked by a waterfall
:- they reflect the process of headward erosion aswell as vertical erosion as the river has a renewed ability to erode vertically