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Their surface is often quenched by the sea water so often at the surface they are, crystals will grow and be visible deeper in the rock.
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∙ 11y ago
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Is basalt common?
Basalts are as common as the formation of the Ocean floor. Basaltic rocks are ferromagnessian rocks and intrusive igneous rocks. This implies they are formed within the Earth's crust, and they make up the ocean floor. They are dark and dense rocks and occurs in large scale as M.O.R.B. (Mid-oceanic Ridge Basalt).
What are the rocks that make up the earths crust?
the crust and the core
What are the rocks that make up this crust?
hard
When does new crust form?
There is new rocks that build up they first start as lava and they build up and make new crust
What are the two types of crust that makes up the continents and ocean?
The two types of crust that make up the continents and ocean are the continental crust and the oceanic crust.
What kind of rocks make up continental crust and oceanic crust?
granite and basalt
Which rocks make up the continental crust?
Granite
What makes close to 95 percent of the rocks of earths crust?
Silicates make up close to 95 percent of the rocks in the Earth's crust
Does aphanitic magma cool and consolidate without growth of mineral grains?
No. If a a rock is "aphanitic" it means that it is so fine-grained that it is impossible to tell which minerals are present in the matrix. The magma itself is not aphanitic. It is the rapid cooling of the magma that inhibits crystal growth and in turn make the rock's matrix aphanitic. Aphanitic rocks are commonly porphyric. Example: A diabase intrusion can be aphantic with white phenocrystals. Intrusions are often more aphanitic near the contact boundary of the rock that is being intruded. This is because the magma cools more rapidly near the cool, pre-existing rock and the crystals there have less time to grow than those in the middle of the intrusion.
How much does silicates make up the rocks in the Earth's crust?
17%
What kind of rock makes up most of the continental crust?
Granite is one of the main rocks that makes up the continental crust.
What makes up close to 95 percent of the rocks in the Earth's crust?
silicates
