212
Chapter 5 Oceanic Sediments
a ROCKFALL
b STABILITY ANALYSIS
C SEDIMENT CREEP
SEA LEVEL
_:.::l.~
_ _ _ _ _ _ _ _ _
NON·COHESIVE
(COARSE)
f GRAIN FLOW
GRAIN FLOW
DEPOSIT
/
/
"
(J)
~----,
~ COARSE.GRAINED ' " OUSTOSTROME
ii TURBIDITES
I~
er
(!)
IZ
W
~
15
w
In
k::--- -
MEDIUM· GA.
TURBIDITES
\
LONG·DISTANCE TRANSPORT
BY TURBIDITY GURRENTS
(UP TO SEVERAL 100's 10
/
1000's km)
MUD TURBIDITES
-E:,-----~OPE
~.:::: ANGLE
:·Z .· " .. T,. SHEAR
".: ."::.~. STRESS
SLIP
PLANE
_ SHEAR
- STRENGTH
METASTABLE
GRAIN PACKING
-+ LlaUEFACTION
SUSPENSION
d SUDE
e SLUMP
9 DEBRIS FLOW
h MUD FLOW
BY UPTAKE
.,,{Ir:::::' "
OF WATER ~r<)l"<:, .:;~; .. : "",,'
FLOW DEP.
~. ~ ' ' , ' 0 "
LlaUEFIED
MUDDY SILT (PARTLY
MIGROFOSSILS ),SJ= 1.4 -1 .7 g/cm 3
:::",
."
GLASTS
FINE,
COHESIVE
LOCALLY:
i COMPOUM:~' GRA\-MUD FLOW
LUMPS
~
SEA LEVEL - - - - - - - - - - - - -
(DGRAIN FLOW
:;' .
• , ~.ot(
LOAD ON TOP OF MUD
,.;';;"
PEBBLY
MUDSTONE