'Extrusive volcanic igneous rocks' presentation slideshows

3. ROCKS

3. ROCKS. Rocks are compact, semi-hard to hard mass composed of one or several minerals and/or mineraloids. On the basis of their mode of origin , rocks can be divided into three basic types: Igneous Sedimentary Metamorphic. ROCK CYCLE.

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Earth composition and Rock cycle

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Rocks

Rocks. A ROCK IS A GROUP OF MINERALS BOUND TOGETHER IN SOME WAY. ROCKS ARE DIVIDED INTO THREE GROUPS BASED ON HOW THE ROCKS FORMED. IGNEOUS ROCKS. SEDIMENTARY ROCKS. METAMORPHIC ROCKS. Igneous rocks. IGNEOUS ROCKS ARE FORMED BY THE COOLING AND HARDENING OF MOLTEN ROCKS.

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