Suggestions(5)
Exact(6)
The mean denudation rate for the four profiles is ∼30 m/Ma.
The mean denudation rate ranges from 9.2 m Ma−1 on the plateau of the Serra do Mar to 37.1 m Ma−1 along the oceanic escarpment of the Serra do Mar.
The mean denudation rate for all river sediment samples throughout the Fanning subcatchment (1100 km2) is 18.47 m Ma− 1, which compares with the estimate at the end of the Burdekin catchment (130,000 km2) of 16.22 m Ma− 1.
In contrast, the amalgamated sand yields an average 10Be concentration of 0.77 ± 0.03 × 106 atoms g−1, and an associated mean denudation rate of 9.6 ± 1.1 m Myr−1, an order of magnitude greater than the rates obtained for the amalgamated pebbles.
These CWDR data suggest that the mean denudation rate during the past 5 14 ka centers around ~ 74.7 ± 25.4 mm·ka− 1, which is consistent with the long-term, geologic exhumation rate we derive of ~ 74 ± 10.1 mm·ka− 1 since the middle Miocene.
Modeling of the 238U 234U 230Th 226Ra disequilibrium variations in the lower part of the profile yields a regolith production rate of 12±4mm/kyr (30 ± 10 T/km2/yr), while modeling of the high-resolution 10Be concentration profile leads to an exposure age of 19.7±2.2kyr, an inherited concentration of 15,000 ± 1,000 at/g in quartz and a mean denudation rate of 22 ± 10 mm/kyr (37 ± 15 T/km2/yr).
Similar(54)
c Mean denudation rates calculated from AHe ages.
Here, we calculated mean denudation rates since the timing of the AHe system closure in each locality.
The seaward-facing scarps of both mountain ranges exhibit mean denudation rates that are approximately 1.5 times those of the inland-facing scarps.
The mean denudation rates of the Cristiano Otoni and São Geraldo escarpments are 17.50 (± 2.71) m My− 1 and 21.22 (± 4.24) m My− 1, respectively.
The mean denudation rates of the Cristiano Otoni and São Geraldo highlands are 8.77 (± 2.78) m My− 1 and 15.68 (± 4.53) m My− 1, respectively.
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