turning points and on deterministic being locked into a path, whereby a chosen solution is reinforced. The way the theory explains phenomena is based on the researched process being locked at from the point of view of a sequence of events, as well
that they blocked main channels for decades. Some channels not only aggraded deeply, but also moved laterally and cut across the inner bends of valley spurs. Now locked in bedrock channels, these valley-spur cutoffs impose local controls on geomorphic, hydraulic