Because they are hard and waterproof. Slate is a particularly good example, as it has the additional advantage of being able to be split into thin layers, so it makes a lightweight roof covering.
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Metamorphic rocks are often used as building materials because they are durable, strong, and resistant to weathering. They also tend to have appealing textures and colors, making them attractive for construction purposes. Additionally, metamorphic rocks can be easily shaped and have low porosity, which makes them suitable for a variety of building applications.
Extrusive rocks, such as basalt, can be used as building materials for road construction and in the production of concrete due to their durability and strength.
Changed rocks are called metamorphic rocks. These rocks are formed from pre-existing rocks that have been altered by heat, pressure, or chemical processes within the Earth's crust. Examples include marble, slate, and schist.
The base geological material in a particular location depends on the region's geological history. Common base geological materials include igneous rocks (e.g. granite), sedimentary rocks (e.g. sandstone), and metamorphic rocks (e.g. marble). It is important to study these materials to understand the local geology and its potential impact on land use and environmental issues.
Gneiss is a metamorphic rock formed from the alteration of pre-existing rocks through intense heat and pressure. It typically exhibits distinct bands of alternating light and dark minerals, giving it a banded or striped appearance.
Construction: Rocks are used as building materials for roads, bridges, and buildings. Landscaping: Rocks are used as decorative accents in gardens and outdoor spaces. Tools: Rocks have been historically used as tools for cutting, grinding, and shaping objects.