Share this entry

Share this page

extrusive

Line breaks: ex|tru¦sive
Pronunciation: /ɪkˈstruːsɪv
 
/

Definition of extrusive in English:

adjective

Geology
Relating to or denoting rock that has been extruded at the earth’s surface as lava or other volcanic deposits.
Example sentences
  • In practice pyroclastic and volcaniclastic rocks include all the products of extrusive volcanic activity except lava flows.
  • The northern margin of the melange is marked by a thrust contact with both the Carboniferous sedimentary rocks and extrusive volcanic sequence.
  • Although there are no outcrops of Devonian extrusive volcanic rocks in NW Scotland, they can be found in southern and central Scotland and the Orkney Islands.

Definition of extrusive in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day Noel
Pronunciation: nəʊˈɛl
noun
Christmas…