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Nigeria
is
situated
at
the
extreme
inner
corner
of
the
Gulf
of
Guinea
on
the
west
coast
of
Africa.
It
borders
with
Chad
to
the
northeast
,Cameroon
to
the
east,
Benin
to
the
west,
Niger
to
the northwest
and
by
the
Atlantic
Ocean
(Gulf
of
Guinea)
to
the
south.
Along
the
entire
coastline
of
Nigeria
lies
a
belt
of
mangrove
swamp
forest
from
10
to
60
miles
in
width,
which
is
intersected
by
branches
of
the
Niger
Delta
and
innumerable
other
smaller
rivers
and
creeks.
Beyond
the
swamp
forest
is
a
zone
from
50
to
100
miles
wide,
of
undulating
tropical
rainforest.
The
country
then
rises
to
a
plateau
at
a
general
elevation
of
2,000
ft
but
reaching
6,000
ft
to
the
east
and
the
vegetation
changes
from
woodland
to
savannah.
In
the
extreme
north,
the
country
approaches
the
southern
part
of
the
Sahara.
The
Niger,
the
third
largest
river
in
Africa
,
enters
Nigeria
from
the
northwest
and
runs
in
a
southeasterly
direction,
meeting
its
principal
tributary, the
Benue,
at
Lokoja,
about
340
miles
from
the
sea.
It
then
flows
south
to
the
Delta,
through
which
it
runs
into
the
Gulf
of
Guinea
via
numerous
channels.
Other
main
tributaries
of
the
Niger
are
the
Sokoto
and
Kaduna
rivers.
The
second
great
drainage
system
of
Nigeria
flows
north
and east
from
the
central
plateau
and
empties
into
Lake
Chad.
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