Discussion on Late Precambrian tectonothermal evolution of the Malverns Complex
Article Abstract:
The tectonothermal evolution of the Malverns Complex has been investigated. The provenance of derital grains in the basal Cambrian sequence has been constrained. The more than 600 Ma ductile deformation of the plutonic igneous rocks of the Malverns is found to predate the development of the latest Proterozoic terrane boundary supported by Pharaoh et al (1994). The presence of a Precambrian terrane boundary along the Malverns Lineament is doubted due to contrasts between the structural style of the lineament and the ductile property of the late Precambrian terrane boundaries in related Avalonian-Cadomian areas.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1997
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Changes in the trace fossil biota across the Proterozoic-Phanerozoic boundary
Article Abstract:
A study was conducted to evaluate the evolution of trace fossil variations during the Proterozoic-Phanerozoic transition. It is shown that these fossils exhibited such diversity in shallow-water clastic seas during the late Proterozoic and increased its abundance and complexity for the Tommotian and Atdabanian stages. Possible world-wide correlation for three trace fossil zones is established for the Redkino and Kotlin, Rovno and Tommotian-lower Atbadanian ranges.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1992
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Vendobionta and Psammocorallia: lost constructions of Precambrian evolution
Article Abstract:
An analysis of the evolution of Precambrian organisms is presented. The absence of biomineralized skeletons and low predation made Vendian evolution pass through diverse channels. It is shown that Vendobionta is characteristic of a kingdom where skin quilting conditioned foliate shapes, large sizes and compartmentalization. On the other hand, Psammocorallia represent coelenterates with internal sand skeletons.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1992
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- Abstracts: Discussion on structural evolution of Mesozoic Peninsular Malaysia. The timing of quartz cementation in Mesozoic sandstones from Haltenbanken, offshore mid-Norway: fluid inclusion evidence
- Abstracts: Some problems concerning the Precambrian-Cambrian transition and the Cambrian faunal radiation
- Abstracts: Some problems concerning the Precambrian-Cambrian transition and the Cambrian faunal radiation. part 2 Phosphogenesis around the Proterozoic-Phanerozoic transition