.
-
.
GENERAL INTROÙUGTION
3
land and. where there is an absence ’of rivers to ‘extend,
'
in a seaward direction, with their deposits such shallows
as have been formed by erosion through wave action. Such
'
regions are on the western coast of ’Nor-th Africa, and the
Çalifornian coasts of America.
effect of rivers in
widening
this shelf can be very clearly seen on the north '
coast of Egypt where it stretches out for over f0rty miles
intheneighbourhood of the Nile months, while 100 miles west
of Alexandria the 100 fathom line is reached within ve
miles.
,_
TIDAL
;0Nç
.
‘
ED_GE
'
J
"
:
:
SEA
SURFACE
'
/
/
Co
,
x'o FM:
‘
'
’î‘
'
5HEu—*
»
:
c
'
’
'
1,000
OV'ER
‘
_
(291,
nm|10ms
_
'
’
’
m à
|
F":
_
.
-
'
-
|
|
-
_
.
«\”;
z
|
'
'
‘
'
'
'
‘(f
|
'
_
|
'
|
.
|
.
.
_
_
//‘4 v
‘
_
_
ABYSS
-
'
Fm.x
.
.
-
From the outer edge of the continental shelf
Continental Slope which is generally taken as stretching
down to 900 or 1,000 fathoms.
This slope is comparatively
,
steep and may be said to constitute the sides of the ocean
basins. - Its upper limit, the 100 fathom line and. outer-edge
'
of
the,
continental shelf, is sometimes kn0wnj as the
f
Continental Edge.
-
-
'_ “ °
}
'.
-
_
-
,
,
«
B
..
_