Is pumice extrusive or intrusive?

extrusive volcanic rock
Pumice is a type of extrusive volcanic rock, produced when lava with a very high content of water and gases is discharged from a volcano.

Is diabase rock intrusive or extrusive?

Diabase is an intrusive igneous rock with the same mineral composition as basalt.

What are the main types of igneous intrusions?

Three common types of intrusion are sills, dykes, and batholiths (see image below).

Is rhyolite extrusive or intrusive?

extrusive igneous rock
rhyolite, extrusive igneous rock that is the volcanic equivalent of granite.

Is granite extrusive or intrusive?

intrusive igneous rock
granite, coarse- or medium-grained intrusive igneous rock that is rich in quartz and feldspar; it is the most common plutonic rock of the Earth’s crust, forming by the cooling of magma (silicate melt) at depth.

How is diabase rock formed?

Diabase is a fine-grained igneous rock that would have formed when molten rock material cooled rapidly on or near the surface of the Earth.

What is unique about diabase?

Diabase is a subvolcanic rock, famous for its extremely solid and durable qualities. British explorers, who named it “Homestone”, discovered the Georgian Diabase in Khazbegi mountainous region. Georgian Diabase is unique for its distinct green color and golden veins.

What is the largest igneous intrusion?

Lopoliths. Lopoliths are the largest known intrusions of dense magma and form a thick saucer shape within the surrounding country rocks.

What type of magma is rhyolitic?

Rhyolitic lavas are viscous and tend to form thick blocky lava flows or steep-sided piles of lava called lava domes. Rhyolite magmas tend to erupt explosively, commonly also producing abundant ash and pumice.

What is a type of intrusive rock?

Intrusive igneous rocks crystallize below Earth’s surface, and the slow cooling that occurs there allows large crystals to form. Examples of intrusive igneous rocks are: diabase, diorite, gabbro, granite, pegmatite, and peridotite.

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