302-Lecture 7

General Outline

Fluvial Landforms

I. Drainage basins

A. North America and world

B. nested and self-organized

C. divides

D. headward erosion, stream piracy, and stream beheading

II. Landforms of alluvial streams

A. floodplains

B. levees; natural and artificial

C. terraces

III. Drainage patterns and rock structure

A. varieties and examples of lithologic control

B. varieties and examples of structural control

IV. Stream evolution and denudation

A. antecedent and superposed streams

B. consequent and subsequent streams

C. wind and wind gaps

D. examples

V. Landforms of stream deposition

A. alluvial fans

B. deltas and progradation

C. geologic history of the Mississippi delta

D. alluvial fans

VI. Stream rejuvenation

A. causes

B. paired terraces

C. entrenched/incised meanders

D. examples

VII. Stream gradation models

A. nickpoints, example of Niagara

B. longitudinal profile; characteristics

C. stream gradation concept