منابع مشابه
Volcanic passive margins: another way to break up continents
Two major types of passive margins are recognized, i.e. volcanic and non-volcanic, without proposing distinctive mechanisms for their formation. Volcanic passive margins are associated with the extrusion and intrusion of large volumes of magma, predominantly mafic, and represent distinctive features of Larges Igneous Provinces, in which regional fissural volcanism predates localized syn-magmati...
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FAS prevention programs attempt to reduce the incidence of drinking during pregnancy by educating women about the risks of alcohol to their unborn babies. Alcoholic beverage warning labels reach a wide audience and have had some effect on curtailing such drinking. Communitybased efforts, however, reach specific populations of women and their health care providers and have a more potent, local ...
متن کاملEdge-modulated stagnant-lid convection and volcanic passive margins
[1] The initial oceanic crust along volcanic passive margins is a factor of 3 greater than that of typical oceanic crust (20 versus 6–7 km). Convection driven by the edge of the continental lithosphere may cause mantle material to circulate through the shallow zone of significant melting beneath the nascent ocean basin and cause the volume of melted mantle to exceed that required to replace the...
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A series of experiments are described in which magnitude estimates of the perceived size of steel balls were made when the balls were actively rolled between the fingertip and several other body sites (thumb, thenar eminence, forearm). This movement, called scripting, involves actively moving an object by a touching surface over another surface of the body which is passively being touched. We d...
متن کاملSeismic imaging of continents and their margins: New research at the confluence of active and passive seismology
Now that the world has well and truly crossed the threshold to the 21st century, it seems timely to review the progress of lithospheric seismic imaging and comment on recent developments in the field. In the context of this special issue, lithospheric seismic imaging refers to any kind of seismic study that gives rise to multidimensional (2-D or 3-D) views of the Earth's interior, from the shal...
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ژورنال
عنوان ژورنال: Astronomy & Geophysics
سال: 1998
ISSN: 1366-8781,1468-4004
DOI: 10.1093/astrog/39.3.3.23