文档介绍：Origins of Facies essions
Change in Flow Strength
ThroughTimeataConstant -1 m
Geographic Position
Migration of a Single Geomorphic Element
6
5
Low
4
3 3-15 m
High 2
1
0
Translation of Laterally Linked Depositional Environments
15-50 m
Sediment Bodies in Fluvial Environments
• Channel Forms–erosional base
• Progradational Forms–depositional
base
• Accretionary Forms–erosional base
Channel Forms
• Meander
• Braided
• Distributary
• hydraulics & energy distribution control vertical profile
Meander Form
• Hydraulics control scour depth
• Energy distribution controls vertical facies ession
• Channel shape: sinuous
• Sandstone shape: flat bottom; convex-up top; blanket
(not sinuous); isolated to amalgamated
• Fining-up vertical profile
• In a drainage basin, rivers tend to have same
hydraulic properties, same scour depth, and channel
sandstones have the same thickness