[x]
Create

Here is what users have to say about Igneous Rock

useravatar
Entry added by CWAnswers Join us and contribute your knowledge as well.

Select content modules

Image:North america rock volcanic.jpg|Volcanic rock in North America. Image:North america rock plutonic.jpg|Plutonic rock in North America.

Welcome to CWAnswers

CWAnswers is your guide to the sprawling world wide web. The directory aims to provide a useful guide made by users. You can share your knowledge as well - simply sign up and edit your first entry. For questions just contact the team at support - at - cwanswers.com.

Weblinks for Igneous Rock

Top 10 for Igneous Rock

Things about Igneous Rock you find nowhere else.

Comments about Igneous Rock

We love comments and hate spam too. You can add your comment by clicking on 'open comment input' below.
Show/Hide

Images found for Igneous Rock

Igneous Rock 1Igneous Rock 2Igneous Rock 3
Igneous Rock 4Igneous Rock 5Igneous Rock 6
Igneous Rock 7Igneous Rock 8Igneous Rock 9

Wikipedia About Igneous Rock

Image:North america rock volcanic.jpg|Volcanic rock in North America. Image:North america rock plutonic.jpg|Plutonic rock in North America.

Igneous rocks (etymology from Latin ignis, fire) are rocks formed by solidification of cooled magma (molten rock). They may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either the Earth's mantle or crust. Typically, the melting is caused by one or more of the following processes — an increase in temperature, a decrease in pressure, or a change in composition. Over 700 types of igneous rocks have been described, most of them formed beneath the surface of the Earth's crust. These have diverse properties, depending on their composition and how they were formed.

Geologic significance

Igneous rocks make up approximately ninety-five percent of the upper part of the Earth's crust, but their great abundance is hidden on the Earth's surface by a relatively thin but widespread layer of sedimentary and metamorphic rocks.

Igneous rocks are geologically important because:

  • their minerals and global chemistry give information about the composition of the mantle, from which some igneous rocks are extracted, and the temperature and pressure conditions that allowed this extraction, and/or of other pre-existing rock that melted;
  • their absolute ages can be obtained from various forms of radiometric dating and thus can be compared to adjacent geological strata, allowing a time sequence of events;
  • their features are usually characteristic of a specific tectonic environment, allowing tectonic reconstitutions (see plate tectonics);
  • in some special circumstances they host important mineral deposits (ores): for example, tungsten, tin, and uranium are commonly associated with granites, whereas ores of chromium and platinum are commonly associated with gabbros.

Morphology and setting

In terms of modes of occurrence, igneous rocks can be either intrusive (plutonic), extrusive (volcanic) or hypabbysal.

Intrusive igneous rocks

IndianGranite.jpg

The central cores of major mountain ranges consist of intrusive igneous rocks, usually granite. When exposed by erosion, these cores (called batholiths) may occupy huge areas of the Earth's surface.

Coarse grained intrusive igneous rocks which form at depth within the earth are termed as abyssal; intrusive igneous rocks which form near the surface are termed hypabyssal.

Extrusive igneous rocks

Igneous%20rock%20Santoroni%20Greece.jpg

Search results for Igneous Rock

igneous rock: Definition from Answers.com

igneous rock A rock which originated as molten magma from beneath the ... Igneous rocks are also classified as acid or basic, according to whether their ...www.answers.com/topic/igneous-rock

Igneous Rocks

Magmas, Igneous Rocks, Volcanoes, and Plutons. Kinds of Igneous Rock. Igneous Rocks are formed by crystallization from a liquid, or magma. ...www.tulane.edu/~sanelson/geol111/igneous.htm

Igneous Rocks

Difference are clue to how and where a rock formed. What are Igneous Rocks? ... the belief that igneous rocks originate as molten rock material deep in the Earth. ...www.geo.ua.edu/intro03/Ignis.html

About Igneous Rocks

The three great rock classes--igneous, sedimentary and metamorphic--are introduced with igneous rocks. ... identifying igneous rocks in the Rock Identification ...geology.about.com/cs/basics_roxmin/a/aa011804a.htm

Igneous Rock Textures

Glassy textured igneous rocks are non-crystalline meaning the rock contains no mineral grains. ... vesicles (holes, pores, or cavities) within the igneous rock. ...geology.csupomona.edu/alert/igneous/texture.htm

Images found for Igneous Rock

Igneous Rock 1Igneous Rock 2Igneous Rock 3
Igneous Rock 4Igneous Rock 5Igneous Rock 6
Igneous Rock 7Igneous Rock 8Igneous Rock 9

News about Igneous Rock

GA Capital Corp.: Kimpar Resources Inc. Completes National Instrument 43-101 Report

CCNMatthews via Yahoo! Finance TORONTO, ONTARIO-- - GA Capital Corp. is pleased to announce that Kimpar Resources Inc. has completed a National Instrument 43-101 technical report from Geoffrey S. Carter, P. Eng. of Broad Oak Associates Inc. , in respect to certain of Kimpar's mineral exploration properties .http://biz.yahoo.com/ccn/080926/200809260488247001.html?.v=1

Stonehenge: Geological Feature Indicates the Site Was Constructed at the End of the Last Ice Age, 14,000 Years Ago

PR.comAs the spotlight turns once again on Stonehenge a British born amateur geologist, Dean Talboys, believes he has rediscovered a geological feature of the site which could give an indication of its true age. In dating the site archeologists have only ever considered radiocarbon determination of samples recovered during excavations. However, Talboys claims that these only indicate periods of ...http://www.pr.com/press-release/107717

News about Igneous Rock

ECU Silver-Success of Geological Model Leads Closer to Reaching ...

Market WireThese intrusions are bodies of igneous rock that have crystallized from molten magma below the surface of the Earth, essentially an underground volcano. These intrusives gave rise to a significant amount of veins, as seen at Velardena, and also to ... http://www.marketwire.com/press-release/Ecu-Silver-Mining-In...

Along the Way: Rocks tell the story

Green Valley News and SunAnd when he comes right out and says Elephant Head is igneous rock ... well, maybe you’d like to raise your hand and debate him. I thought Igneous was some guy’s first name. For 35 years a professor of geology in the Seattle area, Conway, who ... http://www.gvnews.com/articles/2008/09/05/columns/columns02....

SUNY-ESF professors tour Moss Island

Little Falls TimesWhile it is not actually an island, but rather an igneous intrusion separating the highest lock in the Erie Canal system from the natural bed of the Mohawk River, Moss Island remains a favorite site among rock climbers and hikers wanting to see the ... http://www.littlefallstimes.com/news/x1001335460/SUNY-ESF-pr...

Location matters when it comes to making films

Augusta ChronicleMONUMENT VALLEY: Straddling the Utah-Arizona border, this expanse of high desert, big sky and distinctive rock formations ... DEVILS TOWER: Officially, Devils Tower National Monument in Wyoming is a monolithic igneous intrusion. Whatever. Film fans ... http://chronicle.augusta.com/stories/090408/uhl_471874.shtml

2008 Toyota Sequoia Review

The Auto ChanelSteep cliffs of colorful igneous and sedimentary rocks show cracks and fissures where the cactus can secure its roots and hold ... On our right and across the stream bed to our left are massive formations of interspersed rock and caliche (ancient ... http://www.theautochannel.com/news/2008/04/09/083761.html

Search results for Igneous Rock

Introduction to Igneous Rocks

An introduction to igneous rocks requires exploration of three core ideas. Each of these is introduced simplistically below, and then further explored in other pages of the site.http://csmres.jmu.edu/geollab/Fichter/IgnRx/Introigrx.html

IGNEOUS ROCKS TOUR

If you have comments or suggestions, please email bperry@csulb.edu . Click your Mouse on "Back to the Beach!" below if you want to return to the California State ... http://seis.natsci.csulb.edu/basicgeo/IGNEOUS_TOUR.html

card 1 IGNEOUS ROCKS

Welcome to the Geotour Igneous Rocks Module. This module is designed to allow you to learn about igneous rocks at your own speed using images of hand samples and rock outcrops in ... http://seis.natsci.csulb.edu/basicgeo/IGNEOUS/IGNEOUS.html

Igneous Rocks

Some igneous rocks form from volcanic lava. Click on image for full size (26K JPG) Courtesy of USGShttp://www.windows.ucar.edu/tour/link=/earth/geology/ig_intr...

Igneous Rock Textures

Examples of Phaneritic Rocks (the three images below show a hand sample, low magnification of a hand sample and a thin section of phaneritic textured rocks)http://geology.csupomona.edu/alert/igneous/texture.htm
  • Recent
  • Mine
  • Watched
  • Commented
You must be logged in to perform this operation
You must be logged in to perform this operation

Search this site

Videos found for Igneous Rock

Puddles smile and slyly wink to the...

Puddles smile and slyly wink to the whispering slick streets. Lo, a passerby tearfully weeps Weeps t...Puddles smile and slyly wink to the whispering slick streets. Lo, a passerby tearfully weeps Weeps through the panes of the dark Raffish street lights groan and cackle at moths...Flash - Video

Incantation to the Night

Incantation to the NightPuddles smile and slyly wink to the whispering slick streets. Lo, a passerby tearfully weeps Weeps through the panes of the dark Raffish street lights groan and cackle at moths...MPEG 4 - Video

Igneous Rock elm city middle school

Igneous Rock elm city middle schoolThis is done by me but the credit goes to Dawson Noble, Billy Turnage, Turner Garris, Shana Shearin and me Michael RossFlash - Video

Welcome To Baltimore

Welcome To BaltimoreMusic by Igneous Flame, with sights and sounds inside the passenger cabin of a commercial jet landing. An ethereal, relaxing journey.Flash - Video

Geology 2 Minerals

Geology 2 MineralsThe Standard Deviants explore minerals. You'll learn all the basics, starting with that burning question 'What is a mineral'' Then you'll find out about magma and intrusive rocks....Video - Video

Videos found for Igneous Rock

CANV_K2O_DEM.mov

CANV_K2O_DEM.movquicktime: 5.4 MB w:819px - h:614px

MOVIE6.MOV

MOVIE6.MOVquicktime: 1.1 MB w:576px - h:432px

magrhy.mov

magrhy.movThe final phase is the rapid cooling and crystallization of the rock. Extrusive Rock Igneous rocks may also be formed slowly beneath the surface of the earth. Intrusive Igneous Rocksquicktime: 0.4 MB w:320px - h:240px

Xtn.swf

Xtn.swf); Metamorphic Processes (Click Next for: Metamorphic Rock Classification, Metamorphic Rock Names, Metamorphic Grade, Metamorphic Facies). ScienceProf.com : Free samples for evaluation, Crystallizat...flash: 0.0 MB w:550px - h:400px

backSidePan.mov

backSidePan.movFredericksburg and Enchanted Rock bath·o·lith n. Igneous rock that has melted and intruded surrounding stata at great depths. North facing side of Enchanted Rock. (links to a Quicktime Panorama) Enc...quicktime: 0.2 MB w:400px - h:300px

Answers for Igneous Rock

nicktollesonWhat can I do for a igneous rock activity/experiment?nicktollesonFor my class, we made "igneus rocks" but mixing salt and water and letting ot sit for a few days for intrusive rocks. I don't remember how much salt there was or how much water. Then we mixed salt and...lucky thow can an subduction zone help an sedimentary rock become an igneous rock?lucky tigneous rock can come from a volcano... a subduction zone takes rock from the surface (including sedimentary) and carries it below ground, where it can become magma and eventually be ejected from a vo...justine jWhat's the correct order of the formation of igneous rock?justine jMiliWhat types of igneous rocks do not belong to any of the three major igneous rock families?MiliPeriodotite.soccergrl7324Can a sedimentary rock become an igneous rock without changing first to a metamorphic rock?soccergrl7324yes. if sedimentary rock is heated to the melting point before being changed, it becomes igneous rock.
Contact Us[X]
Your name
Email
Subject
Your comment
[X]
Web, Images, Video, News and Answers Search Results are "Powered by Yahoo!"
Web, Images, News Search Results are "Powered by MSN"
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article .
Disclaimer: All other trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners.