What are rocks?
There are 3 types of rocks:
Examples of igneous rocks include basalt, granite, pumice, obsidian, tuff, diorite, gabbro and andesite.
Examples of metamorphic rocks include anthracite, quartzite, marble, slate, granulite, gneiss and schist.
Examples of sedimentary rocks include limestone, sandstone, mudstone, greywacke, chalk, coal, claystone and flint.
What might happen to a rock after a million years?
Rocks and stones are naturally occurring solids made up of minerals.
The Earth's crust is made up of rock.
Rocks have been used by humans for millions of years, from early tools and weapons through to various construction materials.
There are three different types of rocks based on the way they form, igneous, sedimentary and metamorphic.
The metamorphic rock marble is formed from the sedimentary rock limestone.
- The metamorphic rock granulite is formed from the igneous rock basalt.
- There are over 700 different types of igneous rocks.