Rivers Earth Science

Sediments Graded bedding

Sediments Laminations

Sediments Laminations

Sediments Ripple Marks -- asymmetrical

Sediments Ripple Marks -- symmetrical

River Sediments Crossbedding

Sediments Mudcracks

Sediments Mudcracks

Flood Plains Provide a water reservoir during flooding Provide residence time

Drain Patterns Dendritic

Drain Patterns Dendritic Result of water flowing across loose, unconsolidated sediment or soil

Drain Patterns Radial

Drain Patterns Radial Results from water flowing from a dome or hill

Drain Patterns Rectangular

Drain Patterns Rectangular Faulted or fractured rock

Drain Patterns Trellis

Drain Patterns Trellis Tilted or folded rock

Drain Patterns Dendritic Radial Rectangular Trellis

Deltas Tributaries Distributaries

Delta Types Lobate

Delta Types Lobate Large amounts of sediment Weak or disorganized ocean currents

Delta Types Lobate -- Mississippi

Delta Types Arcate

Delta Types Arcate Low sediment Strong, single-direction ocean current

Delta Types Arcate -- Nile

Delta Types Cuspate

Delta Types Cuspate Moderate sediment Strong, two-directional ocean current

Delta Types Cuspate -- Tiber

Delta Types Estuarine

Delta Types Estuarine – Colorado

Delta Types Lobate Arcate Cuspate Estuarine

Superposition The Grand Canyon is a result of the uplift of the land where the Colorado River runs.