* Rock Classification: Rocks are typically classified by their origin, mineralogy, and texture.
* Igneous rocks form from the cooling and solidification of magma or lava.
* Sedimentary rocks form from the accumulation and cementation of sediments.
* Metamorphic rocks form when existing rocks are transformed by heat, pressure, or chemical reactions.
* Variety within Categories: Within each category, there are many different rock types based on their specific composition and formation. For example, granite, basalt, and obsidian are all igneous rocks, but they differ in their mineral content and cooling process.
* Continuous Spectrum: Rock types often exist on a spectrum, with gradual variations between them. This makes it difficult to draw clear lines between distinct types.
Therefore, instead of a specific number, it's more accurate to think of a wide range of rock types, with some estimates suggesting thousands of distinct varieties.
