extrusive

Example Sentences

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Andesite is a fine crystalline intermediate extrusive rock.

From Textbooks • Jan. 1, 2017

When lava is extruded onto the surface, or intruded into shallow fissures near the surface and cools, the resulting igneous rock is called extrusive or volcanic.

From Textbooks • Jan. 1, 2017

Basalt and gabbro are the extrusive and intrusive names for mafic igneous rocks, and peridotite is ultramafic, with komatiite as the fine-grained extrusive equivalent.

From Textbooks • Jan. 1, 2017

These are known as fine-grained extrusive, or volcanic, igneous rocks.

From Textbooks • Jan. 1, 2017

In the Republics of France and of America the President is of an extrusive kind.

From Yet Again by Beerbohm, Max, Sir