Take a moment to think about how the colorado river has evolved through time. focus on how changing base level and stream incision created landforms, such as incised meanders and rincons, and arrange these events accordingly. rank from oldest to youngest. reset a stream migrates laterally across its a rincon forms by the cutoff of an floodplain developing meanders. thislowered by crustal uplift and the river stream terminates at a lake, which is its base level. the base level of the stream is incised meander, which shortens the river. begins to incise downward. incised meanders form. oldest event youngest event