Volcanoes
There are two kinds of explosions (explosive and nonexplosive)
There are four kinds of lava (Aa, Pahoehoe, Pillow, and Blocky)
There are three kinds of pyroclatic material (Volcanic Ash, Lapilli, Volcanic Bombs)
There are three kinds of volcanoes (Shield, Cinder Cone, and Composite)
There are four kinds of lava (Aa, Pahoehoe, Pillow, and Blocky)
There are three kinds of pyroclatic material (Volcanic Ash, Lapilli, Volcanic Bombs)
There are three kinds of volcanoes (Shield, Cinder Cone, and Composite)