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what are the three major rocks
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The three major rock types are:
- Igneous rocks — form by cooling and solidification of molten rock (magma or lava). Examples: granite (intrusive), basalt (extrusive).
- Sedimentary rocks — form by accumulation, compaction and cementation of sediments or by chemical/organic precipitation. Examples: sandstone, shale, limestone.
- Metamorphic rocks — form when existing rocks are changed by heat, pressure, and chemically active fluids without melting. Examples: schist, gneiss, marble.
These types are connected by the rock cycle: rocks can be transformed from one type to another through processes like melting, erosion, burial, and metamorphism.
- Igneous rocks — form by cooling and solidification of molten rock (magma or lava). Examples: granite (intrusive), basalt (extrusive).
- Sedimentary rocks — form by accumulation, compaction and cementation of sediments or by chemical/organic precipitation. Examples: sandstone, shale, limestone.
- Metamorphic rocks — form when existing rocks are changed by heat, pressure, and chemically active fluids without melting. Examples: schist, gneiss, marble.
These types are connected by the rock cycle: rocks can be transformed from one type to another through processes like melting, erosion, burial, and metamorphism.
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