Abstract

Indurated sand is commonly found in Quaternary coastal deposits in a range of temperate and tropical environments. These horizons can record past regionally significant phases of soil development. Also, their lower hydraulic conductivity can produce locally perched water tables and they have been regarded as a potential source of iron in coastal waterways. Samples were analysed from exposures in sand mine pits at Beachmere and in the bank of an estuarine channel at Bells Creek in southeast Queensland. In these samples cements coat grains and usually partially infill interstitial pores. Distinctive cement forms are produced by different constituents that are dominantly kaolinite, amorphous organic-rich complexes or a mix of clay and amorphous material. Trace metal concentrations in the cements are lower than previously reported for soils and modern estuarine sediments in the region. Large-scale exposures at Beachmere reveal that in addition to the podzolisation process, mineral and amorphous organic-rich cements also precipitate from groundwater that preferentially flows through the poorly sorted coarser sediments. OSL and TL ages for the deposits examined indicate that induration occurs over long periods of time, 100,000 ? 70,000 years. Only incipient induration has developed over the last 16,000 ? 2,600 years. The degree of induration, however, is not always proportional with age and is strongly influenced by the texture of the deposits, with gravely sands (OSL age 76,700 ?6,500 yr) exhibiting a greater degree of induration than an adjacent medium to coarse sand (98,000 ?9,900 yr).
Google map showing geographic bounding box with values North bound -27.11 East bound 153.04 West bound 153.02 South bound -27.12
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Product Type/Sub Type

dataset - External Publication - Scientific Journal Paper

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2004

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

External Publication
Scientific Journal Paper
marine
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-27.11
East bound
153.04
West bound
153.02
South bound
-27.12

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

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

Metadata File Identifier

a05f7892-c21e-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

2004-08-17

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

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