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Chemical rocks are based on their composition ie. what they are composed of. What separates chemical from biochemical is whether there is any organic matter like shells or plant fragments present.

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14y ago
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6y ago

Rock are primarily classified on how they were formed:

1. Igneous rocks were formed by heat from magma (melted rock).

2. Sedimentary rocks were formed from layer after layer of deposits laid down on the bed of a body of water, and changing to solid rock over thousands of years.

3. Metamorphic rock is formed from existing rock that is subjected to high heat and high pressure over a period of time.

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9y ago

Rocks are classified by their mineral and chemical compositions. The continuous transformation of one rock type to another forms the rock cycle.

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14y ago

The types are based on their particular method of formation: igneous from melt, sedimentary from lithified sediments, and metamorphic--altered by heat and/or pressure.

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11y ago

How rocks changes

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11y ago

composition and texture

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Q: What are rocks are classified based primarily on?
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Rocks are classified as igneous sedimentary or metamorphic based primarily on their?

Based on their method of formation.


How are rocks related to minerals What is the difference in how rocks and minerals are classified?

A rock is an agglomeration of different minerals. Minerals are classified into categories based on their chemistry: oxides, sulphides, silicates, carbonates etc. Rocks are classified primarily by the process that formed them: igneous, sedimentary, or metamorphic.


How are rocks related to minerals and what is the difference in how rocks and minerals are classified?

A rock is an agglomeration of different minerals. Minerals are classified into categories based on their chemistry: oxides, sulphides, silicates, carbonates etc. Rocks are classified primarily by the process that formed them: igneous, sedimentary, or metamorphic.


Was igneous rocks were classified by their their origin texture and shape?

No, igneous rocks are not classified by their shape. They are primarily classified based on their origin (either intrusive or extrusive) and their texture (coarse-grained, fine-grained, glassy, etc.). Shape or form is not a major factor in the classification of igneous rocks.


Igneous rocks are classified based upon their composition and what?

texture


what are igneous rock classified based upon?

Igneous rocks can be classified by their method of formation and by their mineralogy.


Igneous rocks are classified based upon their what?

Igneous rocks can be classified by their method of formation and by their mineralogy.


Clastic sedimentary rocks are primarily classified on the basis of?

particle size


Are sedimentary rocks classified tofoliated sedimentary rocks?

Metamorphic rocks are classified by foliation or lack there of, not sedimentary rocks. They are classified into Clastic Sedimentary, and Chemical Sedimentary.


How are rocks physically classified?

they are classified into 3 major kinds of rocksthey are the ;IGNEOUS ROCKS,SEDIMENTARY ROCKS,AND METAMORPHIC ROCKS


How is sedimatary rocks classified?

Sedimentary Rocks are classified based on some criterials, such as Origin and Mode of formation. Sedimentary Rocks can be classified into 3 as follows; 1. Clastic Sedimentary Rock. eg. Sandstone. 2. Organic Sedimentary Rock. eg. Limestone. 3. Chemical Sedimentary Rock. eg. Gypsum.


How igneous rock classified?

Geologists classify rocks by where they are formed; above ground or under ground