Here's the breakdown:
* The Rock Cycle: This is a continuous process where rocks are constantly being transformed from one type to another due to various geological processes.
* Heat and Pressure: Heat and pressure are the key factors in this transformation.
* Igneous Rocks: When existing rocks (igneous, sedimentary, or metamorphic) are subjected to extreme heat and pressure deep within the Earth's crust, they melt and form magma. When this magma cools and solidifies, it forms igneous rocks.
* Metamorphic Rocks: Existing rocks (igneous, sedimentary, or even other metamorphic rocks) can be transformed into metamorphic rocks when they are subjected to intense heat and pressure, but without melting. This causes their mineral composition and texture to change.
Examples:
* Limestone (sedimentary rock) can transform into Marble (metamorphic rock).
* Sandstone (sedimentary rock) can transform into Quartzite (metamorphic rock).
* Shale (sedimentary rock) can transform into Slate (metamorphic rock).
In summary, existing rocks can be transformed into different types of rocks (especially metamorphic rocks) when subjected to great heat and pressure, not simply "change."
