extrusive rock

Also found in: Dictionary/thesaurus, Wikipedia

0.01 sec.

extrusive rock

Any igneous rock derived from magma that is poured out or ejected at the Earth's surface. Extrusive rocks are usually distinguished from intrusive rocks on the basis of their texture and mineral composition. Lava flows and pyroclastic debris (fragmented volcanic material) are extrusive; they are commonly glassy (e.g., obsidian) or finely crystalline (e.g., basalts and felsites).

extrusive rock [ik′strü·siv ′räk]

(geology)

volcanic rock

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link

Feedback

Mentioned in	?		References in periodicals archive	?		Encyclopedia browser	?		Full browser	?
No references found			The term was used initially to designate serpentinite and later on, a suite of mafic and ultramafic intrusive rocks (ultramafic rocks, gabbro, and diabase) and volcanic extrusive rocks (Brongniart 1821). Igneous Rock Associations 9. Ophiolites 1: from the beginning to ... by Hebert, Rejean / Geoscience Canada In these "volcanic passive margins," the transitional crust is composed of as much as 20 kilometers of basaltic intrusive and extrusive rock, and the boundaries between thinned continental crust and normal (6-kilometer thick) oceanic crust are likely to be abrupt. Continental margins by Hutchinson, Deborah R. / Oceanus Redton initially focused on the area because it displayed a concentration of high gold values that corresponded with alkali intrusive and extrusive rocks. Geoinformatics Enters Into A Joint Venture With Redton Resources Inc. ... by Business Wire			extrinsic protein extrinsic semiconductor extrinsic sol extrinsic variable star extrophy extrorse extroversion extroversion and introversion extrovert extrudate extruded brick extruded compactor extruded corner extruded joint Extruded Section Extruder Extrusion extrusion billet extrusion coating extrusion cooking extrusion defect extrusion detection extrusion ingot extrusion metal extrusion pressing extrusive rock Extrusive Rocks Exudate exudation exudation vein Exudative-Catarrhal Diathesis EXUG Exuma and Cays exumbrella Exxon Mobil Corporation Eyadema, Gnassingbe Eyadèma, Gnassingbé Eyadéma, Gnassingbe Eyam Eyasi, Lake Eybeschütz, Jonathan Eyck, Jan van Eyck, van Eye eye assay eye bank eye candy eye coal Eye Diseases eye dog eye fly			extrusile extrusion extrusion extrusion extrusion extrusion billet Extrusion blow molding Extrusion Blow Moulding extrusion coating extrusion cooking extrusion defect Extrusion detection extrusion ingot extrusion metal Extrusion molding Extrusion molding Extrusion molding Extrusion molding extrusion pressing Extrusion Production Information and Control System extrusion reflex Extrusion Tooling Solutions Group Extrusion-Cast Explosive extrusions extrusions extrusions extrusions extrusive extrusive Extrusive (geology) extrusive rock Extrusive rocks Extrusive rocks EXTS ExtSLN EXTSN EXTSST extubate extubation Extuberance Extuberancy Extuberant Extuberate Extuberation Extumescence EXTUS Exubera exuberance exuberance exuberance exuberances exuberances exuberances Exuberancy exuberant exuberant exuberant exuberant callus exuberant g exuberant g exuberant g

Encyclopedia

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup

Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.