Volcano

1. low viscosity
2. Flat
3. Hawaii

Annotations:

• Pyroclastic and lava are not emitted during the same eruption. Alternate between pyroclastic and lava flow.

1. More Mafic
2. Shield
3. Low Viscosity
4. Fountain(pressure is great)

1. Coarse-grained Ash and Lapili
   1. Close volcano
2. fine ash
   1. Away volcano

1. 1.Fissure Eruption
   1. Crack in the ground
   2. basaltic lava with low viscosity
2. 2.Hawaiian Eruption
   1. Large scale
   2. sustained flow
   3. gentle eruption with low viscosity lava
3. 3.Strombolian Eruption
   1. short lived
   2. built up air
   3. more viscous and louder
   4. no more danger
4. 4.Vulcanian Eruption
   1. cannon like explosion
   2. subdued(减弱的) eruption
   3. eruptive column reach 5-10km
   4. produce a small quantity of tephra
5. 5.Plinian Eruption
   1. produced an eruption column like Vulanian
   2. sustained like Hawaiian
   3. felsic lava cools quickly and sold form like ash and pyroclastic debris
   4. a large quantities of tephra, pumice and ash

Annotations:

• 1.  Viscosity divides the type of Lava Flow. 2. Silica controls viscosity

1. Basaltic(Mafic) Flow

   Annotations:

   • Silica- poor less viscosity
   1. Pahoehoe
   2. a'a'
   3. Pillow
2. Andesitic Flow
   1. Blokcy lava
3. Rhyolitic (felsic) Flow
   1. Lava Dome

Annotations:

• 1.Rhyolitic eruption 2. gas rich 3.ash

1. Blocks
2. Bombs
3. Lapili
   1. Pumice
4. pyroclastic Flow

   Annotations:

   • Glowing Cloud