Alluvial Bends

BLDGBLOG: Alluvial Bends:
"The Arkansas River. More hypnotically beautiful Army Corps of Engineers cartography"

Dictionary.com Unabridged (v 1.0.1) -
al‧lu‧vi‧al  /əˈluviəl/ Pronunciation Key - Show Spelled Pronunciation[uh-loo-vee-uhl]
–adjective

1.	of or pertaining to alluvium.

al‧lu‧vi‧um  /əˈluviəm/ Pronunciation Key - Show Spelled Pronunciation[uh-loo-vee-uhm]
–noun, plural -vi‧ums, -vi‧a /-viə/ Pronunciation Key - Show Spelled Pronunciation[-vee-uh]

1.	a deposit of sand, mud, etc., formed by flowing water.

2.	the sedimentary matter deposited thus within recent times, esp. in the valleys of large rivers.

I totally agree with the 'hypnotically beautiful' bit...