Correct Answer - Option 3 : Sedimentary rock
Answer:
Limestone is a type of Sedimentary rock.
Concept:
Rock is a hard mass of stone, or a broken-off piece of a boulder, or is slang for a piece of crack cocaine. An example of a rock is a piece of stone found at the bottom of a cliff.
- Metamorphic Rock is one of the major groups of rock that make up the crust of the Earth; it consists of pre-existing rock mass in which new minerals or textures are formed at higher temperatures and greater pressures than those present on the Earth's surface.
- Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.
- A marble that contains impurities such as clay minerals, iron oxides, or bituminous material can be bluish, gray, pink, yellow, or black in colour.
- As metamorphism progresses, the crystals grow larger and become easily recognizable as interlocking crystals of calcite.
- Some other examples of metamorphic rocks are gneiss, slate, marble, schist, and quartzite.
- Plutonic Rock: When magma never reaches the surface and cools to form intrusions (dikes, sills, etc) the resulting rocks are called plutonic. Examples of Plutonic rocks include aplite, greisen, and syenite.
- Sedimentary Rock. : Rock formed of mechanical, chemical, or organic sediment: such as. a: clastic rock (as conglomerate, sandstone, or shale) formed of fragments of other rock transported from its source and deposited in water. Examples of sedimentary rocks include limestone, sandstone, mudstone, greywacke, chalk, coal, claystone, and flint.
- Igneous Rock. Igneous rock is a term used for a rock formed when molten rock cools and hardens. Extrusive, or volcanic, igneous rock cools on the surface as lava. Some examples of igneous rocks are granite, gabbro, basalt.
