In geology, rock or stone is a naturally occurring solid aggregate of minerals and/or mineraloids.
The Earth's outer solid layer, the lithosphere, is made of rock. Three majors groups of rocks are defined: igneous, sedimentary, and metamorphic. The scientific study of rocks is called petrology, which is an essential component of geology.
Rocks are generally classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them. These indicators separate rocks into three types: igneous, sedimentary, and metamorphic. They are further classified according to particle size. The transformation of one rock type to another is described by the geological model called the rock cycle.
Igneous rocks are formed when molten magma cools and are divided into two main categories: plutonic rock and volcanic. Plutonic or intrusive rocks result when magma cools and crystallizes slowly within the Earth's crust (example granite), while volcanic or extrusive rocks result from magma reaching the surface either as lava or fragmental ejecta (examples pumice and basalt).
Basics of Geology All About Rocks and Minerals
Living Rock An Introduction to Earths Geology
Geology Kitchen: The 3 Types of Rocks
Geology for IDiots Episode 1 Rocks Part 2
BBC Men of Rock 1 of 3 Deep Time
Basic Rock Identification: Geology
Fossil Rock Anthem
Geology Kitchen #3 - Clastic Sedimentary Rocks
Geology Rocks @ Maude Price part 1
Geology Kitchen #11 - Igneous Rocks
Geology Kitchen #5 - Chemical & Biological Sedimentary Rocks
Geology Rocks Song Practice
Geology, the rock cycle
Geology, The Study of Rock
Basics of Geology All About Rocks and Minerals
Living Rock An Introduction to Earths Geology
Geology Kitchen: The 3 Types of Rocks
Geology for IDiots Episode 1 Rocks Part 2
BBC Men of Rock 1 of 3 Deep Time
Basic Rock Identification: Geology
Fossil Rock Anthem
Geology Kitchen #3 - Clastic Sedimentary Rocks
Geology Rocks @ Maude Price part 1
Geology Kitchen #11 - Igneous Rocks
Geology Kitchen #5 - Chemical & Biological Sedimentary Rocks
Geology Rocks Song Practice
Geology, the rock cycle
Geology, The Study of Rock
Rock and Mineral Identification
Geology Kitchen #4 - Metamorphism
GEOLOGY ROCKS! (Jasongs)
GEOLOGY ROCKS!
New Haven Elementary 4th Grade Play - Geology Rocks!: Professor Rock is Missing....
25 Strangest Geological Formations On Earth
1 05 Petroleum Geology 5 & 6 Reservoir rock properties & Trapping
Professor Iain Stewart - Geology's 'Rock Star'
Sedimentary Rocks U3A Geology
Identifying Igneous Rocks -- Earth Rocks!
Sedimentary Rock Geology Lab Tutorial by Nancy
EYEWITNESS | Rock & Mineral
Relative Dating of Rock Layers
Geology, PLate Tectonics and the Rock Cycle
Geology Rocks instrumental Song Practice
Igneous Rock Geology Lab Tutorial by Nancy
Geology Rocks! - Rancho Rosal 2nd Grade 2014
Engineering Geology Lec 20 Stress Strain Behavior of Soil and Rock
Radioisotope Dating of Rocks: Challenging an Icon of Evolutionary Geology - Dr. Snelling Part 1
Radioisotope Dating of Rocks: Challenging an Icon of Evolutionary Geology - Dr. Snelling Part 2
Geology of Table Rocks
Geology Mix: The Study of Rock (Mixed by Atom Worth)
Engineering Geology Lec 21 Stress Strain Behavior of Soil and Rock II
Engineering Geology Lec 40 Identification of minerals and rock samples
Engineering Geology Lec 19 Index Properties of Rock and Rock Mass
Michael Steinbacher: Catastrophist Geology | EU2014
Exploring the Geology of the Carolinas: A Field Guide to Favorite Places from Chimney Rock to Ch PDF
Download PDF Exploring the Geology of the Carolinas: A Field Guide to Favorite Places from Chimney R
Cordell Bank Geology
Hiking Oregon's Geology (Hiking Geology) By Ellen Morris Bishop, John Eliot Allen — Download
Deposition (geology)
Rock (geology)
White Mt. Petroglyphs - Wyoming
Living Rock An Introduction to Earths Geology
Geology major fails to foot jump and hits rock bottom - Jump fail
The Geology of Ogof Ffynnon Ddu
Thunder Tiger TTRobotix GHOST+ - Landforms and Geology at Northeast Coast of Taiwan
VIDEO: Geology and human history | Capitol Reef Utah
Geology Rock Hammer Throws
Science Sunday- Geology Rocks and Minerals- Day 743 | ActOutGames
wellsite geology 5
wellsite geology 6
wellsite geology 7
Standard Deviants School Geology Sedimentary and Metamorphic Rocks
Breaking open a geode rock / geology
Lessons On Geology | Rock Layers and Formations
Ms Henderson Geology Rocks (Drue as a Rock)
Engineering Geology Lec 40 Identification of minerals and rock samples
Engineering Geology Lec 21 Stress Strain Behavior of Soil and Rock II