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Igneous rocks are classified using the IUGS classification system, which compares the total alkali (K2O + Na2O wt%) to the total Silica (SiO2 wt%) content.
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What is metamorphic rocks are classified according to?
They are classified by their composition.
Are rocks classified according to their composition and color?
Yes
How igneous rock classified?
Geologists classify rocks by where they are formed; above ground or under ground
How are igneous rocks classified acording to their..?
Igneous rocks are classified by either being intrusive or extrusive, then mafic or felsic then they are classified by either fine grain or course grained textures.
The groups of rocks are classified by?
i think is chemical composition its not chemical composition, it's how they were formed
Groups of rocks are classified by?
i think is chemical composition its not chemical composition, it's how they were formed
Igneous rocks are classified based upon their composition and what?
texture
How are igneous metamorphic and sedimentary rocks classified?
They are classified by origin, method of formation, mineral composition, and texture.
What are Igneous rocks that formed Earth's surface called?
Granite. Plutonic igenous rock/ plutons. Intrusive igenous rock.
What are two features geologists use to classify rocks?
Rocks are classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them. These indicators separate rocks into igneous, sedimentary, and metamorphic. They are further classified according to particle size. The transformation of one rock type to another is described by the geological model called the rock cycle.
What are two examples of rocks?
sedimentary rock and igenous rock.
Besides texture how else are rocks classified?
by their composition
