10Be analysis of a Quaternary weathering profile in the Virginia Piedmont
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
Samples from a residual weathering profile in the Virginia Piedmont have been analyzed for cosmogenic 10Be. Concentrations are highest in clay-rich soil and decrease exponentially to a depth of about 15 m. Despite uncertainties about the processes by which 10Be may be intercepted before entering the solum and eroded after incorporation, a minimum age may be calculated for the regolith. This calculation is based on the delivery rate of 10Be and its decay rate and suggests that this residual profile developed during a period no shorter than 8 × 105 yr. The calculated minimum age may be within a factor of 2 of maximum-age estimates based on surface lowering by erosion and on the rate of rock weathering to saprolite. The vertical distribution of 10Be in the profile could result from a steady-state balance of deposition, weathering, radioactive decay, and erosion.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | 10Be analysis of a Quaternary weathering profile in the Virginia Piedmont |
| Series title | Geology |
| DOI | 10.1130/0091-7613(1985)13<39:BAOAQW>2.0.CO;2 |
| Volume | 13 |
| Issue | 1 |
| Year Published | 1985 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 3 p. |
| First page | 39 |
| Last page | 41 |
| Google Analytic Metrics | Metrics page |