temporal evolution of surface processes inferred from...
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2 1.5 1 0.5 0
Time BP (Ma)
0.0
0.5
1.0
1.5
2.0
2.5
Appa
rent
diff
usio
n co
effic
ient
D (c
m2 /a
)
0.5 1.0 2.0 5.0
Measured [10Be] (106 at/g)
0.5
1.0
2.0
5.0
Mod
elle
d [10
Be](
106
at/g
)
●
●
●●●
●●●
●
U
M
VO
N
PW
S
TTime varying D (best fit model)Constant D
5 10 20 50Measured [26Al] (106 at/g)
510
20M
odel
led
[26Al
](10
6at
/g)
●
●
●●●
●●●
●
U
M
V O
N
PW
S
T
0.5 cm2 /a
1 cm2 /a
1.5 cm2 /a
2 cm2 /a
5 cm2 /a
1:1+20%
-20%
Best fit model
Mid-Pleistocene Transition
Lisiecki and Raymo (2005)
Probability
low high
Inversion of TCN data F
© A
uth
ors
. A
ll r
igh
ts r
eserv
ed
South
ern
Esp
inhaço
Range
Pléiades images extent
Hilltop sampling site
Stream-sediment sampling site
(0.6) Apparent denudation rate (m/Ma)
Minas Gerais
A
Temporal evolution of surface processes inferred from cosmogenic nuclides in a slow erosion setting Insights from the Sera do Cipo range, Brazil
1Aix-Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France2Department of Geography, Minas Gerais Federal University, Brazil
V. Godard1, A. Salgado2, L. Siame1, J. Fleury1, ASTER Team1
Sera do Cipo landscapes Hilltop sampling sites
B
0.00
0.01
0.02
0.03
0.04
0.05
Hillt
op c
urva
ture
(1/m
)
0 1 2 3 4 5 6
Denudation rate (m/Ma)
●
●
●
●
●
●
●
●
M
N
O
P
ST
U
V
W
Hilltop curvature vs apparent denudation rates
Bedrock exposureProbabale weathering-limited regime
E
Hilltop curvature calculationHigh-resolution (1m) DEM derived from tri-stereo Pléiades images
C
0 2 4 6 8 10[10Be] (106 at/g)
4.0
4.5
5.0
5.5
6.0
6.5
7.0
26Al
/10Be
M
NO
PS
T
U
V
W
Steady state erosion
Constant exposure
10Be and 26Al measurements in hilltop quartz veins
D
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