Final answer:
Meander scrolls are remnants of a river's path and can become oxbow lakes when filled with water, created by the river's erosive and sediment deposit actions.
Step-by-step explanation:
Meander scrolls are left behind by meandering rivers as exposed curved ridges, lines of vegetation, or as curved, dry depressions. When these depressions are filled with water, they are oxbow lakes.
The flowing water of a river has the tendency to scour the outer bend of a river channel and deposit sediment on the inner bend, which over time can create these distinctive features.
An oxbow lake is formed when a meander from the main stem of a river is cut off, creating a free-standing body of water.
This process can be seen in the willow-skirted channels and artificial lakes described in the provided excerpts, where the interaction between water and land creates various geographical features.