A fossil record full of holes: the Phanerozoic history of drilling predation: comment
Article Abstract:
The history of drilling predation is discussed wit the contentipn that, although the predation has been a threat continuously in the Phanerozoic and activities of two major clades of drilling gastropods are very important in Cenozoic fauna, the model for variation and importance of drilling predation through time should be somewhat refined. Four-holed Jurassic fossils were seen by other authors as representative of victims of drilling predators. Using the literature, an effort was made to show that the history of drilling predation is continuous since the Late Precambrian, in three waves.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Magmatic crystallization, isobaric cooling, and decompression of the garnet-bearing assemblages of the Jijal sequence (Kohistan terrane, western Himalayas)
Article Abstract:
The Jijal ultramafic-mafic sequence, being the lowermost exposed part of the Kohistan terrane, exhibits garnet-bearing assemblages consisting of a mosaic of magmatic and metamorphic equilibria in its petrography and geothermobarometry. Garnet minerals began to develop and crystallize on these magmatic assemblages at a depth of 50 square kilometers. These developments paved the way for quasi-isobaric cooling of these assemblages, thereby, achieving partial retrograding under amphibolite to green-schist facies conditions.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Hot-side-up aureole in southwest Yukon and limits on terrane assembly of the northern Canadian Cordillera: comment and reply
Article Abstract:
Confusion on the hypothesis regarding the tectonic environment and evolution of the Early Jurassic pluton in the Nisling terrane of the Northern Cordillera arise from the unfortunate choice of terms concerning the structure of the terrane. The term 'Nisling' was applied only to describe rocks in Stikinia, while the 'Yukon-Tanana terrane' was applied too broadly to tectonites.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: The general circulation of the atmosphere. Cosmic dust collection in aerogel
- Abstracts: Vertical distribution of a colonial ascidian on a coral reef: the roles of larval dispersal and life history variation
- Abstracts: A microstructural and argon laserprobe study of shear zone development at the western margin of the Nanga Parbat-Haramosh Massif, western Himalaya
- Abstracts: Significance of rare hydrous alkaline melts in Hawaiian xenoliths. A thermodynamic formulation of hydrous cordierite
- Abstracts: Verner Edward Suomi: 1915-1995. Isaac Van der Hoven: 1923-1995