Comparison of Pb and pollen methods for determining rates of estuarine sediment accumulation

Auteurs :
BRUSH, G. S.
MARTIN, E. A.
DE FRIES, R.
RICE, C. A.

Description :
Comparisons of sedimentation rates obtained by Pb and pollen analyses of 1-m cores collected throughout the Potomac Estuary show good agreement in the majority of cores that can be analyzed by both methods. Most of the discrepancy between the methods can be explained by the analytical precision of the Pb method and by the exactness with which time horizons can be identified and dated for the pollen method. X-radiographs of the cores and the distinctness of the pollen horizons preclude significant displacement by reworking and/or mixing of sediments. Differences between the methods are greatest where uncertainties exist in assigning a rate by one or both methods (i.e., Pb trends and/or possible horizon assignments).


Type de document :
Article de périodique

Source :
Quaternary research New York, 1982, vol. 18, n°. 2, p. 196-217, Références bibliographiques : 35 réf.

Date :
1982