Save
SCIENCE
12.1
Save
Share
Learn
Content
Leaderboard
Learn
Created by
Aimi Sana
Visit profile
Cards (22)
Volcanic
structures are formed due to the cooling of
magma chambers.
Volcanoes
can be categorized based on their activity.
Volcanoes
can be categorized based on their type of eruption.
Volcanoes
can be categorized based on their location on the Earth's surface.
Pyroclastic cones
are small, steep mounds composed of tephra or volcanic fragments formed by explosive eruptions.
A
caldera
is a large circular depression with steep walls and is at least 1-km wide.
Volcanoes
may also be classified based on mound structure, including lava domes, shield volcanoes, composite volcanoes, and pyroclastic cones.
Shield
volcanoes are broad gently-sloping mounds shaped like a soldier’s shield.
Examples of
calderas
include Santorini Island, Mt. Taal Lake, and Yellowstone Park in USA.
Parts
of a volcano include the crater, magma chamber, conduits, dikes, sills, and the vents which could be a central vent, flank vent, or fissure.
Composite
volcanoes, also known as
stratovolcanoes
, are tall, steep, conical mountains.
Lava domes
are roughly circular mounds that form when viscous lava cannot flow too far due to the viscosity and cool into a mound.
Magma chamber
is an open space or an area of a highly fractured susbstrate where magma accumulates
Conduit
is the pipe or vent at the heart of a volcano where material wells up from beneath the surface.
Crater
is a circular depression around a volcanic vent where the lava, ash, and rock erupt out of a volcano.
Volcanic flanks
are the sides of a volcano which usually have fractures.
Volcanic base
is the bottom and foundation of the volcano.
Sills
are beds of rocks that form as a result of rock formation between layers of older materials.
Dikes
are rock sheets that can form from magma when they seep into cracks in rocks.
Parasitic cone
is the cone-shaped accumulation of volcanic material not part of the central vent of a volcano.
Magma chamber, conduit/vent, crater, flank, and base are
primary
parts of volcano.
Sills, dikes, parasitic cone, and caldera are
secondary
parts of volcano.