R meaning in Earth Science ?

Answer: What is Rocks mean?

A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of magma in the asthenosphere.

Rocks are usually grouped into three main groups: igneous rocks, sedimentary rocks and metamorphic rocks. Igneous rocks are formed when magma cools in the Earth's crust, or lava cools on the ground surface or the seabed. Sedimentary rocks are formed by diagenesis or lithification of sediments, which in turn are formed by the weathering, transport, and deposition of existing rocks. Metamorphic rocks are formed when existing rocks are subjected to such high pressures and temperatures that they are transformed—something that occurs, for example, when continental plates collide.: 31–33, 134–139 

The scientific study of the character and origin of rocks is called petrology, which is an essential subdiscipline of geology.

reference

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Rhode Island State Library, Providence, Rhode Island Library Symbol	Academic & Science
Riser	Academic & Science
Retardation	Academic & Science
Receptive	Academic & Science
Rational	Academic & Science
Recluse	Academic & Science
Rain	Academic & Science
Rumex	Academic & Science
Resilience	Academic & Science
Research	Academic & Science
Rose	Academic & Science
Uniroyal	Business
Remittance	Business
Royalties	Business
Retailer's price	Business
Red Eagle Mining Corporation (formerly Romarco Minerals Incorporated)	Business
Rolled	Business
Recycle	Business
Ryder Systems, Incorporated	Business
Risk	Business
Reuse	Business
Risks	Business
Reciprocating	Business
Re-bill	Business
Retailer	Business
Refined	Business
Refused	Business
Rubber	Business
Robotic	Business
Risky	Business
Radiancy	Chemistry
Ideal Gas Constant (8.314 Joules Per Kelvin)	Chemistry
Rankine Temperature Scale	Chemistry
Reactive	Chemistry
Reamer Temperature Ratio	Chemistry
Recipe	Chemistry
Radiation	Chemistry
Redux	Chemistry
Refinement	Chemistry
Responsibility	Community
Restricted	Community
Repent	Community
The Resurrection	Community
Rerun	Community
Respect	Community
Rest	Community
Rithmetic	Community
Righteousness	Community
Repose	Community
Recite	Community
Reprint	Community
Retentive	Community
Recommitment	Community
Rabbi	Community
Rock	Community
Respectful	Community
Rollicking	Community
Racism	Community
Re-tell	Community
Reunite	Community
Rosary	Community
Redemption	Community
Readability	Community
Are	Computing
Read	Computing
Reencoding	Computing
Regensburg	Country Specific
Relational	Database Management
River	Earth Science
Rocks	Earth Science
Redundant	Electronics
Reliability	Electronics
Ratfor (short for Rational Fortran) File	File Type
Ronald	General
Rationing	General
Right on a photo (picture)	General
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Randy	General
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Rex	General
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Realistic	General
Robert	General
Rabid	General
Rook	General
Rubbish	General
Robin	General
Robot	General
Roy	General
Rei	General
Relevance	Governmental
Republican	Governmental
Rimorchio (trailer)	Governmental
Rebelion	Governmental
Republicans	Governmental
Restatement of Law	Governmental
Reward	Governmental
Rider	Governmental
Released	Governmental
Railroad	Governmental
Reasonable	Governmental
Revert	Governmental
Ridiculous	Governmental
Restraint	Governmental
Rates	Governmental
Responsible	Governmental
Racial	Governmental
Rejected	Governmental
Reform	Governmental
Robber	Governmental
Route	Governmental
Resist	Governmental
Reigned	Governmental
Returning	Governmental
RAIPUR JN	Indian Railway Station
Rechts	International
Rector	Jobs
Renormalization	Maths
Rectangle	Maths
Ray	Maths
Rounded	Maths
Relative	Maths
Relevant	Maths
Rationality	Maths
Reciprocal	Maths
Recursive	Maths
Random	Maths
Row	Maths
Real	Maths
Radians	Measurement Unit
Resistance In Ohms	Measurement Unit
Refer	Medical
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Recommended	Medical
Receptor	Medical
Relaxed	Medical
Rectal	Medical
combined hormonal vaginal ring	Medical
Reluctant	Medical
Recto	Medical
Reach	Medical
Rabies	Medical
Rehabilitate	Medical
Rehabilitation	Medical
Repulsive	Messaging
Reflexive	Messaging
Reconnaissance Aircraft	Military and Defence
Ramming	Military and Defence
Regular Army	Military and Defence
Russian	Military and Defence
Ritter (german: Knight)	Military and Defence
Resources	Military and Defence
Rifle	Military and Defence
Search Radius	Military and Defence
Reinforcement	Military and Defence
Readiness	Military and Defence
Rejoining	Military and Defence
Respectfully	Military and Defence
Required	Military and Defence
Radfahrabteilung (german Bicycle Battalion, World War Ii)	Military and Defence
Rank	Military and Defence
Reviewing	Military and Defence
Retreat	Military and Defence
Routine	Military and Defence
Radical	Military and Defence
Regular	Military and Defence
Regiment	Military and Defence
Reply	Networking
Result	Physics Related
Angle of Reflection	Physics Related
Relative Permeability	Physics Related
Responder	Radio Science
Received Solid Signal	Radio Science
Rent	Real Estate
Rand	Regional
Rand (South Africa)	Regional
Refrigerator car	Regional
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Roll	Space Science
Recovery	Space Science
Radial	Space Science
Range	Space Science
Rail	Space Science
Rankine	Space Science
Ratio	Space Science
Rear	Space Science
Regulate	Space Science
Rehydratable	Space Science
Replace	Space Science
Roentgen	Space Science
Yaw Rankine Rate	Space Science
Race	Sports
Relay	Sports
Rebounds	Sports
Runs	Sports
Racing	Sports
Rack	Sports
Restart	Sports
Rally	Sports
Raise	Sports
Removed	Sports
Roster	Sports
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Runner	Sports
Run	Sports
Racer	Sports
Ring	Telecommunication
Raipur Junction	Transport & Travel