The Arrinthrunga Formation: Upper Cambrian epeiric carbonates in the Georgina Basin, central Australia

The Arrinthrunga Formation (Upper Cambrian) in the Georgina Basin, central Australia, is a complex carbonate and mixed carbonate-siliciclastic sequence deposited in an extensive and intermittently emergent epeiric sea. It accumulated on a low-relief substratum in very shallow water with restricted tidal movements; these factors and a warm arid climate contributed to high salinities and the local precipitation of evaporites. Filamentous algae proliferated in the warm hypersaline shallow waters, in which grazing organisms were virtually absent, and exerted a major control on the type and distribution of carbonate lithologies. At the close of the Middle Cambrian a peloid shoal or barrier bar prograded across a broad region of shallow-marine tidal carbonates, bordered in the west by intermittently emergent algal flats. A hypersaline lagoon developed in the lee of the shoal, and a thick sequence of algal-derived peloid lime-muds was deposited. Shoaling sedimentation and intermittent emergence favoured the establishment of gypsiferous algal mats in the northwest, and, with increasing emergence, laminated algal mats colonised much of the area. A transgression of the sea then flushed the stagnant waters, and a reticulate maze of algal bioherms and interbiohermal peloid-ooid sands was established across the whole of the depositional area. Under the influence of shoaling sedimentation and a stable sea level, nearshore environments migrated laterally, and quartz-ooid shoals, intermittently emergent algal mats, and terrigenous sands prograded across the western and central portion of the sea. The progressive shallowing led to local emergence, reduced circulation, and stagnation, so that sections of the sea became isolated and halite evaporite pans were formed. A second transgression of the sea again favoured the widespread growth of algal bioherms, and prograding ooid shoals then spread out across all but the eastern portion of the depositional area. Sedimentation ended as the sea regressed, and a karst erosion surface formed on the emergent landmass.

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Date (Publication)
1981-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/61

Cited responsible party
Role Organisation / Individual Name Details
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Bureau of Mineral Resources, Geology and Geophysics

 Canberra
Author

Kennard, J.

 1
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Bulletin

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211

ISBN

0642065047

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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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  • Geoscientific information

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Unknown

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Product data repository: Various Formats

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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

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  • GA Publication

  • Bulletin

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  • AU-NT

  • AU-QLD

Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

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  • Published_External

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Creative Commons Attribution 4.0 International Licence

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CC-BY

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4.0

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http://creativecommons.org/licenses/

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License

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Australian Government Security ClassificationSystem

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2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

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English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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Download the Bulletin (pdf)

Download the Bulletin (pdf)

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  • pdf

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GA Publication

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Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/a05f7892-9d17-7506-e044-00144fdd4fa6

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GeoNetwork UUID

Language
English
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UTF8
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Commonwealth of Australia (Geoscience Australia)

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Document
Name

Legacy AGSO BMR Bulletins

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Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/61

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/a05f7892-9d17-7506-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:03:35
Date info (Creation)
1996-10-29T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

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