The puzzle of the South Pacific
Article Abstract:
It is possible that the complex distribution of seamounts and islands in the South Pacific is not the result of a chain of volcanoes being created as the oceanic plate moved in relation to a site of active volcanism formed by an upwelling plume from the mantle. New research failed to establish a regular progression in the age of seamounts and islands as they are located further away from the active hotspot, as would have been expected if the plume theory were correct. However, this theory still adequately explains the geometry of age progression of tracks other than the Ngatemato and Taukina chains.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Induction of epidermis and inhibition of neural fate by Bmp-4
Article Abstract:
Bone morphogenesis protein 4, an associate of activin, that is expressed in the embryo, induces epidermis in dispersed gastrula ectoderm and inhibits neural fate, the first known neural inhibitor. In vertebrates, during gastrulation, ectodermal cells can chose between the neural and epidermal fates. The Spemann organizer gives signals to form the nervous system and ectoderm that does not receive this signal forms the epidermis. In Xenopus, however, neural tissue can also be formed when communication between cells is disrupted by cell dissociation or by activin antagonists.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
The paradox of drowned carbonate platforms and the origin of Cretaceous Pacific guyots
Article Abstract:
A series of holes were drilled into Pacific flat topped seamounts, or guyots to help explain the drowning of such Cretaceous platforms. They drowned sequentially during a 60-million year interval whilst being transport by Pacific plate motion northward through a narrow equatorial zone. The platforms appear to be resistant to Cretaceous oceanic anoxic events. The mechanism that causes drowning is still unknown.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Measurement of the Wigner function of an ensemble of helium atoms. Evidence for Efimov quantum states in an ultracold gas of caesium atoms
- Abstracts: Influence of motion signals on the perceived position of spatial pattern. Infants listen for more phonetic detail in speech perception than in word-learning tasks
- Abstracts: Cycling the cosmos. Science in culture: From destruction to creation. Max's modelling
- Abstracts: Going strong or falling apart? Thermodynamic determination of fragility in liquids and a fragile-to-strong liquid transition in water
- Abstracts: Philip L. Wright. Vladimir Evgenevich Sokolov: 1928 - 1998. William B. "Doc" Davis: 1902-1995