Definition of extrusive in English:

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extrusive

Pronunciation: /ɪkˈstruːsɪv/

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.

For editors and proofreaders

Line breaks: ex|tru¦sive

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