upper mantle


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Related to upper mantle: lower mantle
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Noun1.upper mantle - the upper part of the mantleupper mantle - the upper part of the mantle  
layer - a relatively thin sheetlike expanse or region lying over or under another
mantle - the layer of the earth between the crust and the core
References in periodicals archive ?
'Previous studies of Karoo picrites in Africa and Antarctica by us and by other groups have suggested the generation of magmas in the upper mantle, but our new results indicate plume sources were also involved', adds Jussi Heinonen, an Academy of Finland fellow at the Department of Geosciences and Geography at the University of Helsinki.
Their study published in the peer-reviewed journal, PNAS, found this massive methane reservoir between the upper mantle and lower oceanic crust.
Understanding the exchanges and fluxes of carbon (and water) between the upper mantle and exosphere remains a primary goal in the earth sciences community, but critically prevented by the lack of fundamental constrains on the mobility and migration rates of volatile-bearing melts (i.e., co2-h2o-bearing melts) that are important conveyors for the distribution of volatiles.
In a new study, which was published in the journal (https://www.geochemicalperspectivesletters.org/article1917) Geochemical Perspective Letters , researchers from the U.S., Australia, Canada and France said that they have found traces of substances from the Earth's core leaking into the upper mantle. They were able to make their discovery after studying various rock samples taken from the mantle and the surface.
Computer simulations of large asteroid impacts suggest that, under the right conditions, an iron-nickel core of an asteroid may be dispersed into the upper mantle (the layer between the Moon's crust and core) during an impact.
An important point to also cover with Year 11 EES students is that most of the oceanic lithosphere is rigid upper mantle peridotite, similar in composition to the underlying asthenosphere.
Meanwhile, deep within the earth's upper mantle, extreme heat, and pressure cocooned a stone that was destined to become the world's largest graded diamond to date by the Gemmological Institute of America (GIA).
They found that ocean water atop the plate runs down into the Earth's crust and upper mantle along the fault lines that lace the area where plates collide and bend.
Don't get me wrong--this flowing upper mantle is still solid rock.
Diamonds are mainly formed around or below one hundred miles beneath the Earth's crust, in the Earth's upper mantle and transition zone.
In 'Explore Lost Worlds', visitors join Mleiha's experts on an incredible journey into the worlds of the past, walking through several ages of ancient sea beds, discovering the graves of long dead creatures and inspecting the earth's upper mantle as it lays exposed on the sands.
In 'Explore Lost Worlds', visitors join Maliha's experts on an incredible journey into the worlds of the past, walking through several ages of ancient sea beds, discovering the graves of long dead creatures and inspecting the earth's upper mantle as it lays exposed on the sands.