42
a
I
/
I
/
I
I
I
I
PROXIMAL
BRAIDED RIVER
(LOWER
ALLUVIAL FAN)
b
i
MINOR
CANNEL
BAR-EDGE
SAND WEDGE
DEBRIS FLOW
DEPOSIT
SUPERIMPOSED
BARS
c
DEEP.
MINOR
CHANNELS
MAJOR
CHANNEL
OR
CHANNEL
SYSTEM
SHALLOW.
GRAVEL BEDS
GRAVEL BEDS
Fig. 2.16. Braided river systems. a-c Proximal to
middle reaches, gravel-dominated (b), or sand-dominated (c) with minor proportion of gravel. d-f Distal,
sand-dominated system with wide channels and flat,
Chapter 2 Continental Sediments
d
DISTAL BRAIDPLAIN
SUPRERIMPOSED
LlNGUOID
BARS
LONGITUDINAL
BAR
f
SUPERIMPOSED
FLOOD
1 CYCLES
FINE SAND ,
SILT AND
CLAY OF
FLOODPLAIN
SHALLOW,
PERENNIAL
EPHEMERAL,
SHEET FLOODS
linguoid sand bars (d and e), or wide floodplain
rarely inundated by flash floods (1). (After MiaU
1985)
a
I
/
I
/
I
I
I
I
PROXIMAL
BRAIDED RIVER
(LOWER
ALLUVIAL FAN)
b
i
MINOR
CANNEL
BAR-EDGE
SAND WEDGE
DEBRIS FLOW
DEPOSIT
SUPERIMPOSED
BARS
c
DEEP.
MINOR
CHANNELS
MAJOR
CHANNEL
OR
CHANNEL
SYSTEM
SHALLOW.
GRAVEL BEDS
GRAVEL BEDS
Fig. 2.16. Braided river systems. a-c Proximal to
middle reaches, gravel-dominated (b), or sand-dominated (c) with minor proportion of gravel. d-f Distal,
sand-dominated system with wide channels and flat,
Chapter 2 Continental Sediments
d
DISTAL BRAIDPLAIN
SUPRERIMPOSED
LlNGUOID
BARS
LONGITUDINAL
BAR
f
SUPERIMPOSED
FLOOD
1 CYCLES
FINE SAND ,
SILT AND
CLAY OF
FLOODPLAIN
SHALLOW,
PERENNIAL
EPHEMERAL,
SHEET FLOODS
linguoid sand bars (d and e), or wide floodplain
rarely inundated by flash floods (1). (After MiaU
1985)