For 10 points, name this type of lake that forms from a bend in a river.
In 2003, a team of Austrian scientists led by Fischer and Wieltschnig used one of these to study the impact of lysis-inducing viruses on sediment-layer dwelling bacteria, discovering that viruses play only a minor role in sedimentary carbon exchange. Robert Chant used acoustic Doppler profiling to study the formation (*) of these bodies, and in 1994, Winemiller found that they decrease in both biodiversity and biomass over time. They result from the creation of a secondary flow of suspended mass following transition to vortex flow, and their formation is preceded by the formation of a sediment- depositing channel. For 10 points, name this type of lake that forms from a bend in a river.
In 2003, a team of Austrian scientists led by Fischer and Wieltschnig used one of these to study the impact of lysis-inducing viruses on sediment-layer dwelling bacteria, discovering that viruses play only a minor role in sedimentary carbon exchange.
{oxbow} lakes [accept: {Billabong}s]