Mafic

Here, the magma is classified as Mafic, which has a lower silicone content within the minerals that compose the flow – the resulting rocks tend to be rich in pyroxenes and olivines, and are darker in color.

2010 April 20 « worlds in a grain of sand 2010

Here, the magma is classified as Mafic, which has a lower silicone content within the minerals that compose the flow – the resulting rocks tend to be rich in pyroxenes and olivines, and are darker in color.

Thar She Blows « worlds in a grain of sand 2010

Here, the magma is classified as Mafic, which has a lower silicone content within the minerals that compose the flow – the resulting rocks tend to be rich in pyroxenes and olivines, and are darker in color.

2010 April « worlds in a grain of sand 2010

Mafic igneous rocks tend to be dark in color because they contain a large proportion of minerals rich in iron and magnesium (pyroxene, amphiboles, and olivine).

Igneous rock 2007

Mafic magma produces igneous rocks rich in calcium, iron, and magnesium and are relatively poor in silica (silica amounts from 45 to 52%).

Igneous rock 2007

Mafic recharge overcomes these barriers to eruption, and, as it also promotes efficient mixing, results in preferential eruption of mixed andesitic magmas.

Naturejobs - All Jobs Adam J. R. Kent 2010

The presence of Mafic et Felsic rocks with anomalous zinc and copper make this an exploration property of merit.

The Earth Times Online Newspaper 2010

Mafic Studios depicts how solar power satellites could beam energy to Earth from orbit in this animation.

Livescience.com 2009

The presence of Mafic et Felsic rocks with anomalous zinc and copper make this an exploration property of merit.

Marketwire - Breaking News Releases 2009

I mean the real Geological Question here should be, how does Extreme Ocean Pressure affect the Crystalline Structure of the Magama, and Rocks?, you would think the structures formed would be far different than say Mafic material deposited at a shallow sea environment?

Original Signal - Transmitting Buzz 2009