|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 3 van 7 gevonden artikelen
| Titel: |
Late Cambrian and early Ordovician stages in Western Queensland |
| Auteur: |
Jones, P. J. Shergold, J. H. Druce, E. C. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 18 (1971) nr. 1 pagina's 1-32 |
| Jaar: |
1971-05 |
| Inhoud: |
Three stages, Payntonian, Datsonian and Warendian in ascending order, are proposed for sequences of trilobite and conodont faunas occurring about the Cambrian-Ordovician boundary in the Burke River Structural Belt, western Queensland. They are defined with reference to the base of a measured section at Black Mountain, 59 miles (95 km) northeast of Boulia. The base of the Payntonian Stage is marked by the incoming of tsinaniid and saukiid trilobite faunas; that of the Datsonian by incoming conodonts of the Cordylodus proavus Assemblage-Zone, together with leiostegiid trilobites; and that of the Warendian by conodonts of the C. prion-Scolopodus Assemblage-Zone, with rare asaphid and dikelokephalinid trilobites. The top of the Warendian is marked by strata containing multicostate scolopodids. All three stages are recognized in Cambrian and Ordovician sequences extensively exposed in northern and central Australia, and evidence is cited for their recognition elsewhere. Payntonian is compared to the Asian Stages, Feng-shanian, Yenchouan, and basal Wanwanian, of China, Manchuria, and Korea. Datsonian is considered equivalent to the early Tremadocian, and Warendian to the late Tremadocian, of Europe. Datsonian is also thought to be equivalent to the North American late Trempealeauan and basal Canadian (Zone A), and Warendian to the Canadian Zones B through D. The Cambrian-Ordovician boundary is drawn at the base of the Datsonian Stage. Thus, the Payntonian is recognized as the youngest Upper Cambrian Stage in Australia. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 7 gevonden artikelen
| << vorige | volgende >> |