EXTRUSIVE IGNEOUS ROCKS TYPES AND PICTURES

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1 Agglomerate
Agglomerate is made up of rounded lumps of other igneous rocks.

2 Pumice
Pumice is full of gas bubbles and is very light. It will float on water.

3 Rhyolite
Rhyolite is fine-grained. It contains quartz and feldspar.

4 Obsidian
Obsidian has a smooth surface. It splinters easily, forming sharp edges.

5 Basalt
Basalt is the most common lava rock. It forms when lava cools quickly and fine-grained.

6 Tuff
Tuff is formed from hardened volcanic ash.

To be Continued....Watch out for my next article "Introduction To Sedimentary Rocks"

Read previous Article : intrusive igneous rocks types and pictures

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