Authors / CoAuthors
Belperio, A.P.
Abstract
The central Great Barrier Reef Province is characterised by a mainland prograding terrigenous clastic shoreline and an inner shelf dominated by fluvially derived mud. The Burdekin River acts as a large point source of sediment, which is dispersed to the northwest of the mouth. Fluvial sand is wholly contained within the coastal zone and the sand and gravel components of inner and middle-shelf sediments are largely relict or palimpsest. Vertical accumulation of terrigenous mud is limited to a thin veneer on the inner shelf and is negligible on the middle shelf. Coastal progradation accounts for the bulk of Holocene terrigenous sedimentation, which decreases in a northwesterly direction, from 2.5 m yr-1 at the present delta front to 0.1 m yr-1 on the coastal plain north of Townsville. Progradation of the shoreline occurs as four distinct sedimentary assemblages (beach-ridge plain, chenier plain, mangrove-mud-flat plain, and barrier bar-lagoon complex). The overall prograding coastal wedge, where preserved in the geological record, would have recognisable seismic stratigraphic elements (coastal onlap and toplap, distal down lap and marine offlap). The pattern of late Quaternary sea-level oscillations suggests that terrigenous marine and/or alluvial sediments should predominate across most of the shelf of the Great Barrier Reef lagoon.
Product Type
document
eCat Id
81147
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GA PublicationJournal
- ( Theme )
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- marine
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- QLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1983-01-01T00:00:00
Creation Date
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unknown
Topic Category
geoscientificInformation
Series Information
BMR Journal of Australian Geology and Geophysics 8:3:179-190
Lineage
Unknown
Parent Information
Extents
[-20.5, -17.26, 144.09, 149.54]
Reference System
Spatial Resolution
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Source data not available.