Rocks and Their Types Rocks are naturally occurring solid geological formations that are formed through various processes throughout Earth's history. They c...
Rocks and Their Types
Rocks are naturally occurring solid geological formations that are formed through various processes throughout Earth's history. They can be broadly categorized into three main types: igneous, sedimentary, and metamorphic.
Igneous Rocks
Igneous rocks are formed when molten rock, often called magma, cools and solidifies underground. Examples include basalt, obsidian, and rhyolite.
Sedimentary Rocks
Sedimentary rocks are formed when sediments, such as sand, silt, and clay particles, are accumulated and compacted over time. Examples include sandstone, shale, and limestone.
Metamorphic Rocks
Metamorphic rocks are formed when existing rocks are subjected to extreme geological forces, such as high temperature and pressure. Examples include marble, slate, and gneiss.
Additional Points
Igneous rocks can be further classified into intrusive and extrusive based on the direction of magma flow.
Sedimentary rocks can be classified into volcanic, non-volcanic, and transitional based on their origin.
Metamorphic rocks can be further classified into regional and contact metamorphic based on their geographical location and the nature of the surrounding rocks