What is the rock cycle explain briefly, Science

What is the rock cycle explain breifly?

The rock cycle is the full "life" of a rock from its original formation to its demise through weathering, and rebirth through recrystallization and extrusion. The rock cycle was first described by the geologist James Hutton. The concept of the rock cycle is considered by many to be the basic outline of physical geology.

There are five stages in the typical rock cycle:

1. Crystallizing magma cools into "new" rocks (Why do we say "new" rocks? Are not all rocks the same age?).
2. Then weathering breaks the rocks into smaller fragments which are then transported via rivers or wind, then deposited at the beach.
3. This sediment then undergoes lithification, cementation, and compaction into new sedimentary rock.
4. After millions of years resting and accumulating on the sea floor, subduction finally pulls these sediments down where they are melted and metamorphized into new rock material.
5. Then this material is melted and extruded again at the surface of the Earth, the rock cycle is complete, and a "new" rock is born.
An entire rock's cycle may take millions or even billions of years, depending on where the rock is deposited and how long it is "stuck" in any of the five stages of the rock cycle.

There are three basic rock types in the rock cycle. The first rock type is igneous rock, which originates when molten lava cools and solidifies. This process is called crystallization, and may occur at depth or at the surface of the Earth. The igneous rock, now at the surface, is exposed to weathering and erosion. These processes break it down into sediment, which is then transported via river or wind and deposited as sediment at the bottom of the sea.

Lithification, which means "conversion into rock", of the sediment forms a new sedimentary rock, which is the second kind of rock in the cycle. The sedimentary rock will then eventually be subducted, or taken underground, into the crust of the Earth and melted into metamorphic rock.

This new metamorphic rock is the third kind of rock, and will then eventually be melted and then rise to the surface of the Earth (again) and be extruded as new rock.

This full cycle does not always take place, as this is an idealized rock cycle. What actually happens to each individual rock in reality can vary greatly. Some rocks take "short cuts" in the rock cycle. For example, a piece of lava that cools into a new rock may then immediately be re-melted and mixed with other rocks to become a new metamorphic rock variety; all of this without ever being a sedimentary rock.

Posted Date: 5/1/2013 3:27:13 AM | Location : United States







Related Discussions:- What is the rock cycle explain briefly, Assignment Help, Ask Question on What is the rock cycle explain briefly, Get Answer, Expert's Help, What is the rock cycle explain briefly Discussions

Write discussion on What is the rock cycle explain briefly
Your posts are moderated
Related Questions
Some potato cores were weighed and then placed into a dilute sugar solution. After 2 hours, they were taken out of the solution, dried on a paper towel and weighed again. The mass

researched method in socieal science with sample sarvay

Explain Isoelectric  pH Isoelectric  pH:   Many  ionizable groups are  present  in  a  protein molecule. Depending on the pH of the medium, some of these groups act as proton

why the sun important for the water cycle

You are the mayor of a beautiful city by the ocean, and your city is connected to the mainland by a set of k bridges. Your city manager tells you that it is necessary to come up wi

what is thermal velocity ofa material

How would I give a presentation to the public on the use of Malathion as a means to control mosquitos

is it true or false that, as the universe expands, it is expanding within an already existing universe

amy i paying you for answrs

Explain the Somatosensory System The somatosensory system consists of: 12 pairs of cranial nerves, and 31 pairs of spinal nerves   All our conscious awaren