What is the difference in ultramafic rocks and mafic rocks?
网页2024年6月14日 · AnswerBot. ∙ 2mo ago. Ultramafic rocks have higher concentrations of magnesium and iron compared to mafic rocks. Ultramafic rocks also have a lower silica content and typically form from the ...
Which cools faster mafic or felsic rocks? - Answers
网页2024年5月26日 · AnswerBot. ∙. Mafic rocks cool faster than felsic rocks because they have a higher melting point and therefore solidify more quickly. Felsic rocks, on the other hand, contain more silica and ...
Which characteristic is common to extrusive igneous rocks?
网页2024年6月13日 · A common characteristic of extrusive igneous rocks is their fine-grained texture, which is a result of their rapid cooling at the Earth's surface. This rapid cooling prevents large mineral ...
Is olivine an important mineral in peridotites and other ultramafic ...
网页yes
What is the average composition of rocks comprising a large
网页2024年6月14日 · The average composition of rocks comprising a large composite cone or stratovolcano is andesitic magma. It is the intermediate type between basaltic and dacitic magma.
Why are there almost no extrusive ultra-basic rocks in earths
网页2024年6月17日 · Igneous rocks are formed when magma does what? The Igneous rock formed when magma cools are; 1. Extrusive (Volcanic) Igneous Rock; which are igneous rocks formed when magma cools outside the ...
As compared to ultramafic rocks mafic rocks have a? - Answers
网页greater proportion of silica. Tags Geology Volcanoes Geology Volcanoes
Where do we find ultramafic rocks? - Answers
网页Ultramafic rocks are of relatively small extent in the North Cascades, but are geologically significant because they are derived from the Earth's mantle.
The average composition of rocks comprising a large composite
网页2024年6月13日 · The rocks found in these volcanoes are primarily andesite, which is an intermediate volcanic rock with a composition between basalt and rhyolite. Additionally, you may also find other volcanic ...
Why don't igneous rocks form fossils? - Answers
网页2024年6月21日 · No. Igneous rocks do not contain fossils, because fossils cannot withstand the temperature during melting process, that leads to the formation of magma. Wiki User. ∙ 12y ago. Igneous rock was ...