Publications

BibTex format

@article{Dethier:2014:10.1130/G34922.1,
author = {Dethier, DP and Ouimet, W and Bierman, PR and Rood, DH and Balco, G},
doi = {10.1130/G34922.1},
journal = {Geology},
pages = {167--170},
title = {Basins and bedrock: Spatial variation in 10Be erosion rates and increasing relief in the southern Rocky Mountains, USA},
url = {http://dx.doi.org/10.1130/G34922.1},
volume = {42},
year = {2014}
}

Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - © 2014 Geological Society of America. We used measurements of cosmogenic 10Be in alluvium to estimate erosion rates on a 103-104 yr time scale for small (0.01-47 km2), unglaciated basins in northern Colorado, southern Wyoming, and adjacent western Nebraska (western United States). Basins formed in Proterozoic cores of Laramide ranges are eroding more slowly (23 ± 7 mm k.y.-1, n = 19) than adjacent basins draining weakly lithified Cenozoic sedimentary rocks (75 ± 36 mm k.y. -1, n = 20). Erosion rates show a relationship to rock resistance and, for granitic rocks, to basin slope, but not to mean annual precipitation. We estimated longer-term (> 105 yr time scale) erosion rates for the granitic core of the Front Range by measuring the concentration of 10Be and 26Al produced mainly by muon interactions at depths 1.7-10 m below the surface. Concentrations imply erosion rates of 9-31 mm k.y. -1, similar to shorter-term erosion rates inferred from alluvial sediment. The spatial distribution of erosion rates and stratigraphic evidence imply that relief in the southern Rocky Mountains increased in the late Cenozoic; modern relief probably dates from post-middle Miocene time.
AU  - Dethier,DP
AU  - Ouimet,W
AU  - Bierman,PR
AU  - Rood,DH
AU  - Balco,G
DO  - 10.1130/G34922.1
EP  - 170
PY  - 2014///
SN  - 0091-7613
SP  - 167
TI  - Basins and bedrock: Spatial variation in 10Be erosion rates and increasing relief in the southern Rocky Mountains, USA
T2  - Geology
UR  - http://dx.doi.org/10.1130/G34922.1
VL  - 42
ER  -

Download

DrDylanRood

Contact

Location

Summary

Citation

BibTex format

RIS format (EndNote, RefMan)