Some articles on mantle, upper mantle, upper:
... In the Earth, the lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth ... the weaker, hotter, and deeper part of the upper mantle ... over continental crust, from which he inferred that there must exist a strong upper layer (which he called the lithosphere) above a weaker layer which could flow (which he called the ...
... determined to have generated in the Earth's upper mantle by partial melting of mantle rocks ... peridotite, an ultramafic rock that may represent fragments of the upper mantle incorporated into the magma during its ascent to the surface ... are not representative of the original magmas formed in the mantle certain processes, such as separation of phenocrysts from the liquid from which they crystallized have altered their ...
... The mantle differs substantially from the crust in its mechanical properties which is the direct consequence of chemical composition change (expressed ... The distinction between crust and mantle is based on chemistry, rock types, rheology and seismic characteristics ... The crust is a solidification product of mantle derived melts, expressed as various degrees of partial melting products during geologic time ...
... to be moving at a very great rate relative to one another), the hotspots and that part of the upper mantle in which they are embedded is termed the "Hawaiian ... This observation implies that the sublithospheric mantle over which the plates are moving comprises the same reference frame in which the hotspots are embedded ... The origin of hotspots, whether from deep mantle plumes, mid-mantle melting anomalies, or intraplate fractures, is constrained somewhat by the mesoplate hypothesis ...
... in the Northern Cordilleran Volcanic Province include mantle plumes, deglaciation and slab windows, although continental rifting is the most accurate mechanism for activating volcanism in ... One hypothesized explanation for oceanic island basalt in the Earth's upper mantle under the Northern Cordilleran Volcanic Province is the existence of a slab window ... evidence linking the production of magma in the upper mantle to a possible tectonic system has been stated ...
Famous quotes containing the words mantle and/or upper:
“There are a sort of men whose visages
Do cream and mantle like a standing pond,
And do a willful stillness entertain,
With purpose to be dressed in an opinion
Of wisdom, gravity, profound conceit,
As who should say, I am Sir Oracle,
And when I ope my lips let no dog bark!”
—William Shakespeare (15641616)
“Surely you wouldnt grudge the poor old man
Some humble way to save his self-respect.
He added, if you really care to know,
He meant to clear the upper pasture, too.”
—Robert Frost (18741963)