Citation

Reinson, G.E., 1977. Hydrology and sediments of a temperate estuary - Mallacoota Inlet, Victoria. Bulletin  178. Bureau of Mineral Resources, Geology and Geophysics, Canberra.

Abstract

Mallacoota Inlet is a drowned river valley that is almost cut off from the sea by a barrier-beach complex. Additionally, a flood-tidal delta chokes the mouth of the estuary. Except for fluvial sand in the upper reaches of the estuary, sandy sediments are restricted to the seaward end where hydrodynamic activity is greatest. Muds are confined to basinal and deep-channel environments; silts occur where fresh-water discharge contributes to water circulation, and clays where circulation is restricted. In the coarse fraction of the sediments, feldspar and mica contents are highest, and quartz and carbonate are lowest, where fresh-water discharge contributes. The clay mineral assemblage in the estuarine sediments is generally similar to that of the soil and stream sediments in the source area. Geochemical results show that Fe, V, Cr, Ni, Zn, Cu, and P2O5 levels are highest in stagnant areas where organic-rich clay prevails, whereas Mn and Ti are highest in silts where fluvial discharge is dominant and water circulates relatively freely. The results of the study suggest that the restricted basinal areas of the estuary are similar to fjords in terms of physical and chemical controls on sedimentation. The coastal barrier at Mallacoota was evidently formed by landward progradation during the Holocene, and overlies apparent remnants of a similar Pleistocene barrier. Many similar restricted estuaries exist along the south coast of New South Wales.
Google map showing geographic bounding box with values North bound -37.0 East bound 150.0 West bound 149.5 South bound -38.0
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Product Type/Sub Type

dataset - GA Publication - Bulletin

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1977

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Bulletin
hydrogeology
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-37.0
East bound
150.0
West bound
149.5
South bound
-38.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-9cfe-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

1996-10-29

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays