Title
Variations in particle alignment and size in sediments of the Vema Channel record Antarctic bottom-water velocity changes during the last 400 000 years.
Document Type
Article
Publication Date
1-1-1982
Abstract
The anisotropy of magnetic susceptibility (AMS) and mean particle size in the silt fraction has been measured in surface sediments and selected cores from the Vema Channel. Results show that a function which represents magnetic grain, long-axis alignment is highly correlated with variation in mean size of the carbonate-free silt fraction. An increase in alignment with increase in particle size reflects an increase in bottom-water velocity. This correlation has been used to infer fluctuation in Antarctic Bottom water (AABW) velocity during the last 400 000 years. The period of highest inferred bottom-water velocity resulted in a late Pliocene hiatus marked by a buried manganese pavement.-from Authors
Publication Source (Journal or Book title)
Antarctic geoscience, 3rd symposium on Antarctic geology and geophysics, Madison, August 1977
First Page
1033
Last Page
1038
Recommended Citation
Ledbetter, M., & Ellwood, B. (1982). Variations in particle alignment and size in sediments of the Vema Channel record Antarctic bottom-water velocity changes during the last 400 000 years.. Antarctic geoscience, 3rd symposium on Antarctic geology and geophysics, Madison, August 1977, 1033-1038. Retrieved from https://repository.lsu.edu/geo_pubs/849