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Mantle rocks shallower than about 410 km depth consist mostly of olivine, pyroxenes, spinel-structure minerals, and garnet.
These mionerals make up rocks called peridotite, dunite (olivine-rich peridotite), and eclogite. We know these from xenoliths brought up with magmas.
Between 410 km and 650 km, olivine is no longer stable and is replaced by its polymorphs wadsleyite and ringwoodite.
Below about 650 km, all of the minerals of the upper mantle begin to become unstable due to the extreme pressure and elevated temperatures. It is difficult for us to know which minerals will be stable in these conditions but we believe silicate perovskites and ferropericlase will prediminate (and diamond).
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Do archaeologists study the earths rocks and minerals?
No, Geologist do.
what are plants that make up earths crust?
The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.
In which form do many minerals occur naturally on the earths surface?
Many minerals occur naturally on the earths surface in rock form
Where on earth are minerals found?
Minerals make up the rocks of earth, so minerals are found wherever there are rocks at the surface. Water too is a mineral so this includes the oceans.
What element is abundant in earths crust and combines with oxygen to form rocks and minerals?
Silicon
What is the mantle filled with?
The Earths mantle is filled with ferromagnesian rocks with minerals such as Olivine and Pyroxene.
What is the earth's mantle filled with?
The Earths mantle is filled with ferromagnesian rocks with minerals such as Olivine and Pyroxene.
What does rocks in earths mantle contain a higher percentage of what than rocks in earths crust?
iron and magnesium
How are the mantle and crust alike?
They both have minerals and rocks
When rocks return to earths mantle to earths mantle they can eventually melt and become magma. and are the main factors that control this change.?
heat and pressure
Do archaeologists study the earths rocks and minerals?
No, Geologist do.
what are plants that make up earths crust?
The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.
What layer of the earth contains rocks minerals and soil?
the mantle and crust
Plates are composed of earths crust and?
dirt and rigid rocks
Who studies rocks minerals and earths forms?
geologists
In which form do many minerals occur naturally on the earths surface?
Many minerals occur naturally on the earths surface in rock form
Thin layers of rocks and minerals on earths surface called?
The crust.
