Question

igneous sedimentary and Metamorphic rock are usually composed of​

Answer 1

Hey mate it's composed of several minerals

ok

Thanks

Answer 2

• Igneous Sedimentary and Metamorphic rock are usually composed of​ only two key minerals: silica and a silicate, typically feldspar. ​
• Their unique chemical composition and minerals make them ​easy to identify in the field. ​
• There are four main types of igneous rock: ​basalt, granite, gabbro, and pumice.​​
• They are commonly formed when volcanoes erupt and lava flows to the surface. ​
• Broken obsidian, volcanic glass, and tachylyte are also known as igneous rock.
• Metamorphic rock is formed when the heat and pressure of the Earth’s crust change certain minerals into others.    
• The most common type of metamorphic rock is marble, which is made of calcite and other minerals.    
• Other common types of metamorphic rock are slate, which is made of silica, and gneiss, which is a type of rock with a grain size of less than one millimetre.    
• Due to the great heat and pressure of the Earth’s crust, metamorphic rocks are often folded, broken, and faulted.
• Most igneous rocks are formed when volcanoes erupt, causing molten rock to rise through the earth’s surface.
• The resulting lava flows and obsidian, volcanic glass, and tachylyte are all forms of igneous rock.
• Most igneous rocks are dark in colour, but some, such as granite and gabbro, are light-coloured.
• They are often easy to identify in the field because of their distinctive textures and minerals.

#SPJ3