what is rock cycle ? explain in brief?
Answers
Answer:
The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. Each rock type is altered when it is forced out of its equilibrium conditions. For example, an igneous rock such as basalt may break down and dissolve when exposed to the atmosphere, or melt as it is subducted under a continent. Due to the driving forces of the rock cycle, plate tectonics and the water cycle, rocks do not remain in equilibrium and change as they encounter new environments. The rock cycle explains how the three rock types are related to each other, and how processes change from one type to another over time. This cyclical aspect makes rock change a geologic cycle and, on planets containing life, a biogeochemical cycle.
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Explanation:
The changing of rocks from one type to another under certain conditions in a cyclic manner over thousands of years is called rock cycle. The rock cycle has neither a beginning nor an end. The processes of a rock cycle are:
- The hot molten magma cools to form igneous rocks.
- The igneous rocks are exposed to many agents of weathering and erosion on the surface of the earth.
- The bocken rock fragments, when deposited, form sedimentary rocks according to the time taken.
- The leftover igneous rocks and the newly formed sedimentary rocks are subjected to intense heat and pressure inside the earth. They are changed into metamorphic rocks over time.
- The sedimentary and metamorphic rocks are buried again and forms magma.
- This magma again cools down and forms igneous rocks.
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