23
Table 1.8 Typical sedimentation rates of recent and subrecent marine sediments (data from various sources, e.g.
Berger 1974, Gross 1987).
1.4
Global Patterns of Sediment Distribution
Fig. 1.19 Distribution of major sediment facies across the frontal system of the Antarctic Circumpolar Current
(ACC) between Africa and Antarctica. Numbers are typical sedimentation rates in mm ky
-1 . PF = Polar Front, SAF =
Sub Antarctic Front, STF = Subtropical Front.
sandy
mud
foraminiferal
mud
diatom
ooze
diatom
mud
diatom
foraminiferal
ooze
foraminiferal
nannofossil
mud
foraminiferal
ooze
sandy
mud
65
25
25
15
15
90
750
5
Agulhas
Ridge
PF
SAF
STF
Antarctica
Africa
0
1
2
3
4
5
Depth [km]
0
1
2
3
4
5
CCD
2
deepsea
mud
Weddell Abyssal Plain
Cape Basin
Meteor
Rise
AtlanicIndian
Ridge
Agulhas
Ridge
18
Fa cie s
Are a
Ave ra ge
S e d im e nta tio n Ra te
(m m ky
-1 )
Terrigeneous m ud California B orderland
50 - 2,000
Ceara A by s s al P lain
200
A ntarc tic Continental M argin
30-65
Calc areous ooz e
North A tlantic (40-50 °N)
35-60
North A tlantic ( 5-20 °N)
40-14
E quatorial A tlantic
20-40
Caribbean
~ 28
E quatorial P ac ific
5-18
E as tern E quatorial P ac ific
~ 30
E as t P ac ific Ris e (0-20 °N)
20-40
E as t P ac ific Ris e (~ 30 °N)
3-10
E as t P ac ific Ris e (40-50 °N)
10-60
S ilic eous ooz e
E quatorial P ac ific
2-5
A ntarc tic , Indian S ec tor
2-10
A ntarc tic , A tlantic S ec tor
25-750
Red c lay
Northern North P ac ific (m uddy )
10-15
Central North P ac ific
1-2
Tropic al North P ac ific
0-1
S outh P ac ific
0.3-0.6
A ntarc tic , A tlantic S ec tor
1-2