Citation

Geoscience Australia provides most of its products for free under a Creative Commons Attribution 3.0 Australia Licence. We only require that you reference the use of our data or information using the following citation:
Druce, E.C. & Jones, P.J., 1971. Cambro-Ordovician conodonts from the Burke River structural belt, Queensland. Bulletin  110. Bureau of Mineral Resources, Geology and Geophysics, Canberra.

Abstract

Conodonts from the Upper Cambrian Chatsworth Limestone and Gola Beds and the Lower Ordovician (Tremadocian) Ninmaroo Formation were examined in order to determine the sequence of conodont species. Over 5000 specimens from 600 trough-samples representing a total of 10,000 feet of section were identified. Fifty-three species are described, of which 13 are new and 2 have been given open nomenclature. They are referred to 16 genera, of which one, Strigaconus, is new, and two are indeterminate. No Assemblage Zones could be erected for the Upper Cambrian. However, six Assemblage Zones (in ascending order - Cordylodus proavus, Oneotodus bicuspatus-Drepanodus simplex, Cordylodus oklahomensis-C. findstromi, Cordylodus prion-Scolopodus, Cordylodlls rotundatusC. anglllatus, and Chosonodina herfllrthi-AcodllS) are erected in the Tremadocian. Comparison of our zones with previously described conodont sequences from Europe, North America, and Korea shows that they can be used for intercontinental correlation. Local correlation of sections sampled over a distance of 59 miles shows a diachronous rise of the- lithological members of the Ninmaroo Formation to the south. The phylogenetic relationships of Upper Cambrian and Tremadocian conodont species are discussed. Two root-stocks are recognized in the Upper Cambrian - the coelocerodontids, and the westergaardodinids. A development from a coelocerodontid ancestor of Oneotodus nakamllrai Nogami gave rise to the majority of Tremadocian species, which are characterized by diverse cordylodids and scolopodids. The minor westergaardodinid root-stock gave rise to only two species of Chosonodina. Rates of sedimentation (calculated from the thicknesses of the conodont Assemblage Zones) show a general decrease upwards throughout the sequence, and a decrease southwards along the outcrop, from Black Mountain to Mount Datson.
Google map showing geographic bounding box with values North bound -10.0 East bound 153.0 West bound 138.0 South bound -28.5
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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)

1971

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Bulletin
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-10.0
East bound
153.0
West bound
138.0
South bound
-28.5

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Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

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

Metadata File Identifier

a05f7892-9d14-7506-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

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pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
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