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Modern surface sediments and non-deposition in Ellis Fjord, eastern Antarctica
journal contribution
posted on 2023-05-16, 11:11 authored by Andrew McMinnAndrew McMinn, Bloxham, JJ, Whitehead, JEllis Fjord is a small, fjord-like marine embayment in the Vestfold Hills, eastern Antarctica. Modern sediment input is dominated by a biogenic diatom rain, although aeolian, fluvial, ice-rafted, slumped and tidal sediments also make a minor contribution. In areas where bioturbation is significant relict glaciogenic sediments are reworked into the fine-grained diatomaceous sediments to produce poorly sorted fine sands and silts. Where the bottom waters are anoxic, sediments remain unbioturbated and have a high biogenic silica component. Three depositional and non-depositional facies can be recognised in the fjord: an area of non-deposition around the shoreline; a relict morainal facies in areas of low sedimentation and high bioturbation; and a basinal facies in the deeper areas of the fjord.
History
Publication title
Australian Journal of Earth SciencesVolume
45Issue
4Pagination
645-652ISSN
0812-0099Department/School
Institute for Marine and Antarctic StudiesPublisher
Blackwell ScientificPlace of publication
Cambridge, Massachusetts, USARepository Status
- Restricted