Strahler Stream Order Classification

dendritic drainage

rectangular drainage

parallel drainage

deranged drainage

radial drainage

Fluvial cycles of denudation after Davies

Youth Late maturity Early youth Old age Late youth Early maturity following uplift and rejuvenation

Middle age

Davisian old-age peneplains are not evident in Earth’s present scenery. However, major unconformities in the rock record are examples (indicated here by arrows).

Rejuvenation of River Flowing on a Peneplain (flat erosion surface)

Valley Cut Downward Through Overlying Deposits

Uplift While Stream Cuts Downward

Antecedent rivers

Antecedent river (Delaware Water Gap)

Uplift of the Colorado Plateau initiated incision of the Colorado River

5-3 ma.

_Hillview reservoir

Jerome Park reservoir