Endogenic Processes
19
SEDI MENT
5
.. > > ~ ~
E
~
~
~
CONTI
v
:t: 10
I> OCEA NIC CRUST , .. 10
Fig. 1.4. Cru stal structure of
ocean margin off northern Chile ,
based on se ismic refracti on
studi es. [R. L. Fi sher, R. W.
Raitt, 1962, Deep-Sea Res 9:
423]
"
15
250
> ~
~
200
> , >
. .
~
. .
> .. > •
MANTLE
':"'ll!"lll'
100
50
DISTANCE ( km )
Fig. 1.5. Hypothetical convecti on current s in the upper mantl e, producing sea-floor spreading and
continental drift. Thi s is one of a number of co nvect ion models whi ch have bee n pro posed to ex pl ain
the origin of mid-ocean ridges and trenches
15
19
SEDI MENT
5
.. > > ~ ~
E
~
~
~
CONTI
v
:t: 10
I> OCEA NIC CRUST , .. 10
Fig. 1.4. Cru stal structure of
ocean margin off northern Chile ,
based on se ismic refracti on
studi es. [R. L. Fi sher, R. W.
Raitt, 1962, Deep-Sea Res 9:
423]
"
15
250
> ~
~
200
> , >
. .
~
. .
> .. > •
MANTLE
':"'ll!"lll'
100
50
DISTANCE ( km )
Fig. 1.5. Hypothetical convecti on current s in the upper mantl e, producing sea-floor spreading and
continental drift. Thi s is one of a number of co nvect ion models whi ch have bee n pro posed to ex pl ain
the origin of mid-ocean ridges and trenches
15