Create an account
a place at the river's mouth, where the river splits into many different sections, forming a marshy triangle.
an elongated lowland between ranges of mountains, hills, or other uplands, having a river or stream running along the bottom
a large, bowl-shaped depression in the surface of the land, often drained by a single river (the Amazon Basin)
a flat or nearly flat land adjacent to a stream or river that experiences occasional or periodic flooding.
a relatively flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together