Zobrazeno 1 - 10
of 92
pro vyhledávání: '"C. McA. Powell"'
Autor:
C. Mca. Powell
Publikováno v:
Geological Journal. 8:95-110
Multiple siltstone dykes intruded parallel to cleavage in the Ludlovian argillites and graywackes of the Lake District throw new light on the origin of slaty cleavage. Pore pressures equalling lithostatic pressure developed during the Caledonian orog
Publikováno v:
Tectonophysics. 375:9-36
The Melbourne Zone comprises Early Ordovician to Early Devonian marine turbidites, which pass conformably upward into a mid-Devonian fluviatile succession. There are four pulses of Silurian to mid-Devonian deep-marine sandstone-dominated sedimentatio
Publikováno v:
Gondwana Research. 6:285-289
Autor:
C. McA. Powell, Zheng-Xiang Li
Publikováno v:
Earth-Science Reviews. 53:237-277
In the last 1000 million years, Australia has been part of two supercontinents: Palaeozoic Gondwanaland and Neoproterozoic Rodinia. Neoproterozoic Australia was covered by shallow epicontinental seas, and, in the late Neoproterozoic, by low-latitude
Publikováno v:
Earth and Planetary Science Letters. 187:83-93
Widespread eolian red clay underlying the Plio–Pleistocene loess–palaeosol succession in northern China has been dated magnetostratigraphically back to 8.35 Ma, indicating that the East Asian monsoon started at about the same time as the Indian m
Publikováno v:
Precambrian Research. 99:33-64
Palaeocurrents, provenance and stratigraphic analysis of the upper part of the Mount Bruce Supergroup and the Wyloo Group in the southwestern part of the Hamersley Province of the Pilbara region of Western Australia have been used to define an early
In May 1976 Lucian B. Platt organized a highly successful Penrose Confer ence on The Formation of Rock Cleavage at Bryn Mawr College in Penn sylvania, U. S. A. The meeting drew together about 70 specialists from both sides of the Atlantic and fro
Publikováno v:
Economic Geology. 93:1084-1090
One current model for the origin of giant hematite ores of the Hamersley province requires a two-step process: formation of martite and goethite by supergene enrichment, followed by burial metamorphism to convert goethite to microplaty hematite. Our
Publikováno v:
University of Western Australia
Self demagnetisation, also referred to as shape demagnetisation, affects both the induced and remanent magnetisation of any magnetised body. In the case of weak-intermediate susceptibility (k < 0.1 SI), its effects are insignificant and can be neglec
Publikováno v:
Tectonics. 14:154-167
Paleomagnetism of the Upper Devonian reef complexes in the Canning Basin, Western Australia, was reinvestigated with a primary aim of testing its magnetization age. Samples were collected from back reef and reefal limestones, basinal red beds, syndep