Sedimentology of the Permian Radok Conglomerate in the Beaver Lake of MacRobertson land, East Antarctica
Article Abstract:
Argillaceous sandstones, coals, conglomerates and thin carbonaceous siltstones constitute the Upper Permian Radok Conglomerate, which is a portion of the major continental rift system, the Lambert Graben. This conglomerate is present in Beaver Lake, East Antarctica. Poor sheet stream flow and sediment gravity flow, deposit of organic sediment in peat-forming wetlands and disintegration of suspension in shallow waters result in seven recurrent lithofacies. A quartzo-feldspathic rock layer is present over the unexposed 400 m thick base.
Publication Name: Geological Magazine
Subject: Earth sciences
ISSN: 0016-7568
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
An initial continental margin plutonism - Cretaceous Older Ryoke granitoids, southwest Japan
Article Abstract:
A study of the geochemical and petrographic characteristics of the Older Ryoke granitoids of southwest Japan shows that they were emplaced during the Mid-Cretaceous Period. At that time, before the opening of the Japan Sea, Japan was located at the eastern margin of the Eurasian continent. The Older Ryoke granitoids represent the initial magmatism of the Cretaceous to Paleogene felsic magmatic belt of Pacific Asia. The granitoids were converted to orthogneisses after being emplaced during the regional metamorphism.
Publication Name: Geological Magazine
Subject: Earth sciences
ISSN: 0016-7568
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
Inter-related plutonism and deformation in South Victoria Land, Antarctica
Article Abstract:
A regionally integrated genetic model of geologic processes is presented to explain the crustal deformation in South Victoria Land, Antarctica, that took place in the Lower Paleozoic Ross Orogeny. The Bonney Pluton was intruded into amphibolite facies host-rocks during early Ordovician time causing a variety of deformations in the host-rocks. These deformations included migmatization and amphibolite facies metamorphism of the Koettlitz Group metasedimentary host-rocks.
Publication Name: Geological Magazine
Subject: Earth sciences
ISSN: 0016-7568
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Tectonic history of the eastern edge of the Alexander Terrane, southeast Alaska. GPS-determination of along-strike variation in Cascadia margin kinematics: implications for relative plate motion, subduction zone coupling, and permanent deformation
- Abstracts: Tectonic burial, thrust emplacement, and extensional exhumation of the Cabot nappe in the Appalachian hinterland of Cape Breton Island, Canada
- Abstracts: An experimental study of two garnet pyroxenite xenoliths from the Bullenmeri and Gnotuk Maars of western Victoria, Australia
- Abstracts: An experimental study of two garnet pyroxenite xenoliths from the Bullenmeri and Gnotuk Maars of western Victoria, Australia. part 2
- Abstracts: Structural framework and denudation history of the flanks of the Kenya and Anza Rifts, East Africa. Geophysical evidence for crustal thickness variations between the Denali and Tintina Fault Systems in west-central Yukon