volcanoes

• phreatic is a stream-driven eruption, where hot rocks meet water
• phreatomagmatic is a violent eruption where water meets magma
• strombolian is a weak to violent eruption characterized by fountain lava
• vulcanian is a tall eruption that reaches up to 20 km high with pyroclastic flow and ash fall tephra
• plinian is an explosive type of eruption of gas and pyroclastics
• Pyroclastic is a volcanic eruption that involves high density mixtures of hot, fragmented solids and expanding gases
• Pyroclastic flow have temperatures of >800 degrees celsius or >1500 degrees farenheit
• Examples of phreatic is the Taal Volcano Eruption in Batangas
• Example of phreatomagmatic is the Mt. Fukutoku-Okanoba in Bonin Islands, Japan
• Example of strombolian is the Mt. Irazu in Costa Rica
• Example of vulcanian is the Mt. Paricutin in Mexico
• Example of plinian is the Mt. Pinatubo in Zambales
• Ash is a very small fragments of lava or rock blasted into the air
• Pumice is a light-colored volcanic rock containing lots of bubbles from trapped gases
• volcanoes are usually formed at plate boundaries
• magma is composed of molten rocks, gas bubbles, and suspended crystals
• lava is composed of molten rocks and suspended solid crystals
• Magma chamber - this is where magma and other volcanic ash and gases from underneath the Earth are collected
• volcanoes form from the repeated eruption of lava flow, ash and other pyroclastic materials
• this is a type of volcano that has erupted within the last 10,000 years
• This volcano is currently erupting or has recently erupted
• This is a type of volcano that is currently inactive but have the potential to erupt again
• This is a type of volcano that can no longer erupt
• Composite volcanoes also called stratovolcanoes are tall, symmmetrically shaped and have steep sides
• Shield volcanoes have lava that consists of basalt-which has low viscosity and has a "warrior shield" appearance
• Primary factors affecting the volcanoe's eruptive style are the Magma's temperature, chemical composition, and amount of dissolved gases it contains
• Ash fall tephra is a falling volcanic ash