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Diorite.jpg
Diorite is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), biotite, hornblende, and/or pyroxene. It may contain small amounts of quartz, microcline and olivine. Zircon, apatite, sphene, magnetite, ilmenite and sulfides occur as accessory minerals...

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Earthquake reported in Winston-Salem is 4th to shake Piedmont this week  myfox8.com...

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Granpa Granpa 15 May 2019
0

Internal structure of Earth


Mineral assemblages of common igneous rocks and their relation to the interior structure of the Earth
 
Type
Structure
Density
Bowen's series
Type

Water

Ocean




 
1.0
1.0
0
0.0606
 
6371
0
3.688
 
1.0
 
Pelagic
Amorphous


Silica
(SiO2)

Diatomite…



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