Abstract

As mapped by previous workers, the Corella Formation is the most extensively exposed formation in the eastern succession of the Proterozoic Mount Isa Inlier. Outcrops consist partly or predominantly of thin-bedded calcareous metasediments, many of which are scapolitic, and occur in three zones. The Corella rocks in the westernmost zone, Zone A, form a well-defined stratigraphic unit overlying felsic volcanics dated at about 1780 m.y., and it is suggested that they be assigned to a new formation. Those in the central zone, Zone B, probably belong to at least two separate units, one more than 1740 m.y. old and possibly older than 1870 m.y., and one about 1600 m.y. old, 70 m.y. younger than the Mount Isa Group. Zone B contains the type section for the Corella Formation, but this defines neither the top nor the base of the formation, its location is uncertain, and stratigraphic relations of rock types within it are largely unknown. The suggestion is made that, for the present, the Corella Formation in Zone B be downgraded to Corella beds. The Corella rocks in Zone C, to the southeast, can be assigned to two units-the Doherty Formation, which contains rhyolite dated at about 1720 m.y., and the less-metamorphosed and probably younger Staveley Formation.
Google map showing geographic bounding box with values North bound -20.0 East bound 141.0 West bound 139.0 South bound -22.0
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Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1982-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

81108 Product http://www.ga.gov.au/metadata-gateway/metadata/record/81108/

Keywords

GA Publication
Journal
QLD
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-20.0
East bound
141.0
West bound
139.0
South bound
-22.0

Digital Transfer Options

onLine

Distributor

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

Metadata File Identifier

fae9173a-7031-71e4-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 SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
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