Crater/Caldera: A bowl-shaped due to Volcano activity
Main Vent: Where lava Passes through or a passageway of lava
Secondary Vent: An alternate small vent in a volcano where lava also passes through
Lava Flow: where lava flows in a crater
Magma Chamber - the storage of magma.
Magma - Inside
Lava - Outside
Categories of Volcano :
Types of volcanoes based of shape:
Cinder-cone
composite
shield
Cinder-cone: formed by pyroclastic fragments, volcano ashes, and a bowl-shaped
crater or an oval crater.
Composite - built by strata and tephra a hardened lava parang Matulis at
symmetrical and explosive eruptions.
Shield - A large, gently sloping volcano built up by numerous eruptions of fluid,
basaltic lava, shield-like shape
Types of volcanoes based on their history:
-Active
-Dormant
-Extinct
Active- This volcano exploded once 10k years ago based on analysis
Dormant - This volcano is active but not erupting, But it is expected to erupt
soon.
Extinct - This volcano hasn't erupted in the past 10k years, In other words, it is
not expected to erupt anymore.
Phases of volcanoes
-Preparation phase
-Eruption phase
-Ending phase
Preparation: The magma chamber is filled with magma and the smoke and steam are
coming out in the crater and being observed
Eruption phase: The build-up of magma in magma chamber and seismic activity is
increased and pushed up into the crater
Ending phase: The magma chamber is empty and no seismic activity will happen.
2 Types of volcanic eruptions
Effusive - Low Viscosity -
Explosive - High Viscosity -
Main Vent: Where lava Passes through or a passageway of lava
Secondary Vent: An alternate small vent in a volcano where lava also passes through
Lava Flow: where lava flows in a crater
Magma Chamber - the storage of magma.
Magma - Inside
Lava - Outside
Categories of Volcano :
Types of volcanoes based of shape:
Cinder-cone
composite
shield
Cinder-cone: formed by pyroclastic fragments, volcano ashes, and a bowl-shaped
crater or an oval crater.
Composite - built by strata and tephra a hardened lava parang Matulis at
symmetrical and explosive eruptions.
Shield - A large, gently sloping volcano built up by numerous eruptions of fluid,
basaltic lava, shield-like shape
Types of volcanoes based on their history:
-Active
-Dormant
-Extinct
Active- This volcano exploded once 10k years ago based on analysis
Dormant - This volcano is active but not erupting, But it is expected to erupt
soon.
Extinct - This volcano hasn't erupted in the past 10k years, In other words, it is
not expected to erupt anymore.
Phases of volcanoes
-Preparation phase
-Eruption phase
-Ending phase
Preparation: The magma chamber is filled with magma and the smoke and steam are
coming out in the crater and being observed
Eruption phase: The build-up of magma in magma chamber and seismic activity is
increased and pushed up into the crater
Ending phase: The magma chamber is empty and no seismic activity will happen.
2 Types of volcanic eruptions
Effusive - Low Viscosity -
Explosive - High Viscosity -
