Discussion and Reply: Shaping the Australian crust over the last 300 million years: Insights from fission track thermotectonic imaging and denudation studies of key terranes |
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Authors: | D E Leaman B P Kohn P B O'Sullivan A J W Gleadow R W Brown K Gallagher |
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Institution: | 1. Leaman Geophysics , GPO Box 320, Hobart, Tas., 7001, Australia;2. School of Earth Sciences , University of Melbourne , Vic., 3010, Australia;3. Apatite to Zircon Inc. , 1521 Pine Cone Road, Moscow, ID, 83843, USA;4. T. H. Huxley School of Environment, Earth Science and Engineering , Imperial College of Science, Technology and Medicine , London, SW7 2AS, UK |
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Abstract: | Ellis 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. |
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Keywords: | Antarctica biogenic diatoms Ellis Fjord Holocene sediments |
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