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Sandstone is a sedimentary rock. It is a rock made of compacted sand. Sand is small grains of rocks and minerals (such as quartz and feldspar). These are the most common minerals in the Earth's crust.
Sandstone which is resistant to weathering is used for building in many countries. It can be a hard rock. For example, paving slabs can be made out of hard sandstone.
Sandstone is converted into quartzite through heating and pressure. This happens when rocks are squeezed and heated under a mountain chain.[1]
Sandstone is most likely to be deposited from fast pacing water such as rivers.
- ↑ Metamorphic rock is formed by tectonic compression in orogenic belts.