Product catalogue
Modern dynamics, morphology and habitats of slope-confined canyons on the northwest Australian margin
Repeat multibeam mapping of two slope-confined canyons on the northwest Australian margin provides new understanding of the processes that are active in shaping these environments. The Cape Range and Cloates Canyons initiate on the mid- to lower continental slope, but are connected to the shelf via small channels and gullies. These canyons were first mapped systematically with multibeam sonar in 2008 and were remapped in 2020 during a biodiversity survey that also collected high-resolution imagery and biological samples from a deep-water Remotely Operated Vehicle. Comparison of features between the two surveys indicates active sliding, minor headwall retreat and continued excavation of deep floor depressions, reflecting the action of high energy turbidity currents. Significantly, intact blades of displaced seagrass imaged throughout both canyons at depths up to 4200 m indicates that sediment sourced from the adjacent continental shelf is being channelled through these canyon systems. Sedimentation likely regulates benthic communities in these canyons, with imagery showing highest densities of sessile invertebrates in habitats protected from sedimentation (e.g. rock overhangs). Repeat mapping provides an understanding of the dynamics of these canyons and a context for assessing and monitoring the stability of the seabed habitats within a marine reserve.
<b>Citation:</b> Alexandra L. Post, Rachel Przeslawski, Rachel Nanson, Justy Siwabessy, Deborah Smith, Lisa A. Kirkendale, Nerida G. Wilson, Modern dynamics, morphology and habitats of slope-confined canyons on the northwest Australian margin, <i>Marine Geology</i>, 2022, 106694, ISSN 0025-3227,
Simple
Identification info
- Date (Creation)
- 2021-01-01
- Date (Publication)
- 2023-10-20T06:13:33
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/144553
Identifier
- Codespace
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Digital Object Identifier
- Cited responsible party
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Role Organisation / Individual Name Details Author Post, A.L.
Author Przeslawski, R.
Author Nanson, R.
Author Siwabessy, J.
Author Schmidt Ocean Institute
mailto:deborah.s@soi-team.org Author Kirkendale, L.A.
Author Wilson, N.G.
Publisher Elsevier B.V.
External Contact
- Name
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Marine Geology
- Issue identification
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Volume 443, January 2022, 106694
- Purpose
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AMSA conference 2021 abstract
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Post, A.
Space Division Internal Contact Resource provider Space Division
External Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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Marine Geoscience
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Geomorphology and Regolith and Landscape Evolution
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- Keywords
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Repeat multibeam bathymetry mapping
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- Keywords
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Submarine canyons
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- Keywords
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Turbidity currents
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- Keywords
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Benthic biota
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- Keywords
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Marine reserve
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- Keywords
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Marine peak
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
- Other constraints
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Crown Copyright © 2021
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
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Link to Journal
Link to Journal
- Distribution format
-
Resource lineage
- Statement
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Article published in Marine Geology Journal
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/ebb0fe87-728a-47e9-83cb-6aabf4468eae
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Owner Post, A.
Space Division Internal Contact Point of contact Post, A.
Space Division Internal Contact
Type of resource
- Resource scope
- Document
- Name
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Journal Articles and Conference Papers
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/144553
- Date info (Creation)
- 2019-04-08T01:55:29
- Date info (Revision)
- 2019-04-08T01:55:29
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551