-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
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ded
from
ww
w.a
nnua
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rgby
Uni
vers
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Twin
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ry o
n 02
/10/
11. F
or p
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nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
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from
ww
w.a
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vers
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Wils
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ibra
ry o
n 02
/10/
11. F
or p
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nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
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ded
from
ww
w.a
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Uni
vers
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Twin
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Wils
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ibra
ry o
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/10/
11. F
or p
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nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
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ded
from
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w.a
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Uni
vers
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Twin
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Wils
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ibra
ry o
n 02
/10/
11. F
or p
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nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
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Uni
vers
ity o
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Twin
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Wils
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ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
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rgby
Uni
vers
ity o
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Twin
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Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
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rgby
Uni
vers
ity o
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Twin
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Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
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rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
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rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
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rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
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rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
Dow
nloa
ded
from
ww
w.a
nnua
lrevi
ews.o
rgby
Uni
vers
ity o
f Min
neso
ta -
Twin
Citi
es -
Wils
on L
ibra
ry o
n 02
/10/
11. F
or p
erso
nal u
se o
nly.
-
Ann
u. R
ev. E
arth
Pla
net.
Sci.
1994
.22:
597-
656.
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1994
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1994
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1994
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1994
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1994
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1994
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1994
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1994
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1994
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