5/5 gaurav k. 2 years ago on Google
SIZE,
DEPTH,
WATERSHED,
WATER
QUALITY,
etc
1.
Lake
Superior
is,
by
surface
area,
the
world's
largest
freshwater
lake.
2.
The
surface
area
of
Lake
Superior
(31,700
square
miles
or
82,170
square
kilometers)
is
greater
than
the
combined
areas
of
Vermont,
Massachusetts,
Rhode
Island,
Connecticut,
and
New
Hampshire.
3.
Lake
Superior
contains
as
much
water
as
all
the
other
Great
Lakes
combined,
even
throwing
in
two
extra
Lake
Eries.
Its
volume
is
second
only
to
Russia's
Lake
Baikal.
4.
Lake
Superior
contains
10%
of
all
the
earth's
fresh
surface
water.
5.
There
is
enough
water
in
Lake
Superior
(3,000,000,000,000,000--or
3
quadrillion--
gallons)
to
flood
all
of
North
and
South
America
to
a
depth
of
one
foot.
6.
The
deepest
point
in
Lake
Superior
(about
40
miles
north
of
Munising,
Michigan)
is
1,300
feet
(400
meters)
below
the
surface.
7.
Over
300
streams
and
rivers
empty
into
Lake
Superior.
8,
The
average
elevation
of
Lake
Superior
is
about
602
feet
above
sea
level.
9.
The
Lake
Superior
watershed
region
ranges
in
size
from
160
miles
inland
near
Wabakimi
Provincial
Park
to
only
5
miles
inland
from
Pictured
Rocks
National
Seashore.
10.
The
Lake
Superior
shoreline,
if
straightened
out,
could
connect
Duluth
and
the
Bahama
Islands.
11.
The
average
underwater
visibility
of
Lake
Superior
is
27
feet,
making
it
easily
the
cleanest
and
clearest
of
the
Great
Lakes.
Underwater
visibility
in
places
reaches
100
feet.
Lake
Superior
has
been
described
as
"the
most
oligotrophic
lake
in
the
world."
12. The
lake
is
about
350
miles
(563
km)
in
length
and
160
miles
(257
km)
in
width.
13.
In
the
summer,
the
sun
sets
more
than
35
minutes
later
on
the
western
shore
of
Lake
Superior
than
at
its
southeastern
edge.
14.
Lake
Superior
has
over
400
islands,
the
largest
of
which
is
Isle
Royale,
with
a
size
of
207
square
miles.
15.
Waves
of
over
40
feet
in
height
have
been
recorded
on
Lake
Superior.
16.
Travel
by
car
around
Lake
Superior
covers
a
distance
of
about
1,300
miles.
17.
The
largest
underwater
formation
in
Lake
Superior
is
the
Superior
Shoal,
which
rises
from
a
depth
of
over
1,000
feet
to
within
20
feet
of
the
water
surface
over
a
distance
of
just
three
miles.
18.
Sudden
changes
in
winds
or
barometric
pressure
around
Lake
Superior
can
produce
seiches,
a
phenomenon
which
results
in
water
levels
rising
or
falling
as
much
as
six
feet
along
a
coast
in
a
short
period
of
time.
19.
Water
in
Lake
Superior
is
retained,
on
average,
191
years.
GEOLOGY,
FLORA
AND
FAUNA,
CLIMATE,
etc.
1.
Lake
Superior
is
one
of
the
earth's
youngest
major
features,
at
only
about
10,000
years
of
age--dating
to
the
last
glacial
retreat.
By
comparison,
the
earth's
second
largest
lake
(by
surface
area,
and
largest
by
volume),
Lake
Baikal
in
Russia,
is
25
million
years
old.
2.
Fifty-eight
orchid
species
are
native
to
the
Lake
Superior
basin.
In
North
America,
only
Florida
has
more
native
orchid
species.
3.
Lake
Superior
produces
the
greatest
lake
effect
snows
on
earth.
(Significant
lake
effect
snows
are
a
rare
phenomenon,
occurring--besides
on
the
Great
Lakes--only
on
the
east
shore
of
Hudson
Bay
and
the
west
coasts
of
two
Japanese
islands.)
Lake
effect
snows
extend
20
to
30
miles
inland,
primarily
on
the
Ontario
shore
southeast
of
Marathon,
and
from
Sault
Ste.
Marie
to
the
Wisconsin-Michigan
border.
Average
annual
snowfall
in
Michigan's
Keweenaw
exceeds
200
inches
in
places.
4.
Lake
Superior
has
been
at
its
modern
elevation
for
only
about
2,000
years,
when
elevations
of
Lake
Michigan
and
Lake
Huron
dropped,
creating
a
rapids
at
Sault
Ste.
Marie.
5.
Lake
Superior
has
its
origins
in
the
North
American
Mid-Continent
Rift
of
1.1
to
1.2
billion
years
ago,
which
produced
a
huge
plume
of
hot
mantle
where
the
present
lake
sits.
The
crust
tore
apart,
leaving
an
arc-shaped
scar
stretching
form
Kansas
through
Minnesota,
then
down
to
Michigan.
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