Volcanoes PDF

VOLCANOES  VOLCANOES Can you share your experience connected to a volcano or volcanic eruption?  VOLCANOES In your own words, what is a volcano?  VOLCANOES From the italian word “vulcano” meaning “burning mountain”. Vulcan, Roman God of Fire...

VOLCANOES  VOLCANOES Can you share your experience connected to a volcano or volcanic eruption?  VOLCANOES In your own words, what is a volcano?  VOLCANOES From the italian word “vulcano” meaning “burning mountain”. Vulcan, Roman God of Fire  VOLCANOES From the italian word “vulcano” meaning “burning mountain”. Vulcan, Roman God of Fire  VOLCANOES A volcano is an opening in the Earth's crust that allows lava, ash, and gases to erupt  VOLCANOES Have you seen a volcano in person? Taal Volcano Do you know how volcanoes form?  VOLCANOES Do you know how volcanoes form?  VOLCANIC FORMATION volcanoes form along the boundaries of Earth's tectonic plates  VOLCANIC FORMATION One plate sinks which melts. The molten material rises, and then erupt that can form volcano VOLCANIC FORMATION  VOLCANIC FORMATION volcanoes form along the boundaries of Earth's tectonic plates  VOLCANIC FORMATION They form along convergent plate boundaries convergent means colliding PARTS OF A VOLCANO  PARTS OF A VOLCANO Main Vent major opening of magma to go out. Magma Chamber large reservoir deep inside the Earth  PARTS OF A VOLCANO Crater formed by the outward explosion of rocks and other materials from a volcano.  PARTS OF A VOLCANO Caldera formed by the inward collapse of a volcano PARTS OF A VOLCANO  PARTS OF A VOLCANO Lava Flow stream of molten rock flowing out of the crater.  PARTS OF A VOLCANO Secondary Vent smaller and alternative opening of magma Secondary Cone/Parasitic Cone formed when lava escapes from  PARTS OF A VOLCANO Conduit (Pipe) An underground passage magma travels through.  PARTS OF A VOLCANO Throat Entrance of a volcano. The part of the conduit that ejects lava and volcanic ash.  PARTS OF A VOLCANO Ash Fragments of lava or rock smaller than 2 mm in size that are blasted into the air by volcanic explosions. Ash Cloud A cloud of ash formed by volcanic explosions. TYPES OF VOLCANO IN TERMS OF SHAPE  TYPES OF VOLCANO IN TERMS OF SHAPE Cinder Cones (Scoria Cones) simplest and most common type Smallest type, steep sides built from loose volcanic debris from single eruption vent. TYPES OF VOLCANO IN TERMS OF SHAPE  TYPES OF VOLCANO IN TERMS OF SHAPE Cinder Cones (Scoria Cones) They form after violent eruptions Examples: ⚬ Taal ⚬ Mount Babuyan ⚬ Mayabobo TYPES OF VOLCANO IN TERMS OF SHAPE Taal TYPES OF VOLCANO IN TERMS OF SHAPE Mayabobo TYPES OF VOLCANO IN TERMS OF SHAPE Babuyan  TYPES OF VOLCANO IN TERMS OF SHAPE Composite Volcanoes (Stratovolcanoes) the classic “volcano” shape. tall, symmetrical cones Large,steep-sided formed by layers of lava, ash, and volcanic rocks.  TYPES OF VOLCANO IN TERMS OF SHAPE Composite Volcanoes (Stratovolcanoes) Large,steep-sided formed by layers of lava, ash, and volcanic rocks Eruption Frequency: Less frequent, more  TYPES OF VOLCANO IN TERMS OF SHAPE Composite Volcanoes (Stratovolcanoes) built up by successive eruptions of domes, lava flows and pyroclastic flows  TYPES OF VOLCANO IN TERMS OF SHAPE Composite Volcanoes (Stratovolcanoes) Mt. Fuji Mt. Mayon Mt. Pinatubo TYPES OF VOLCANO IN TERMS OF SHAPE Mt. Fuji TYPES OF VOLCANO IN TERMS OF SHAPE Mt. Mayon TYPES OF VOLCANO IN TERMS OF SHAPE Mt. Pinatubo  TYPES OF VOLCANO IN TERMS OF SHAPE Shield Volcanoes largest volcanoes form from low-viscosity lava gently sloping volcano much wider than they are tall.  TYPES OF VOLCANO IN TERMS OF SHAPE Shield Volcanoes Eruption Frequency: Frequent, less explosive eruptions. formed from eruptions that occurred intermittently over long periods of time (up to a million years  TYPES OF VOLCANO IN TERMS OF SHAPE Shield Volcanoes Mauna Loa Mauna Kea Olympus Mons TYPES OF VOLCANO IN TERMS OF SHAPE Mauna Loa TYPES OF VOLCANO IN TERMS OF SHAPE Mauna Kea TYPES OF VOLCANO IN TERMS OF SHAPE Olympus Mons TYPES OF VOLCANO IN TERMS OF SHAPE Olympus Mons TYPES OF VOLCANO IN TERMS OF SHAPE Olympus Mons  TYPES OF VOLCANO IN TERMS OF SHAPE Lava Domes (Volcanic Domes) form by the slow oozing of highly viscous lava smaller formations often form within the craters of larger volcanoes.  TYPES OF VOLCANO IN TERMS OF SHAPE Lava Domes (Volcanic Domes) Dome-shaped Mount St. Helens Mount Amorong TYPES OF VOLCANO IN TERMS OF SHAPE Mount St. Helens TYPES OF VOLCANO IN TERMS OF SHAPE Mount Amorong  TYPES OF VOLCANO IN TERMS OF ERUPTIVE HISTORY Active have erupted within 600 years or at least once in the past 10,000 years Dormant active but not erupting. expected to erupt soon Extinct have not have any eruption in the past 10,000 years