Download Objective: Identify and describe the three kinds of volcanic cones

5.6 NOTES
How are volcanoes classified?
Objective: Identify and describe the three kinds of volcanic cones
Objective: Identify and describe the three kinds of volcanic cones
Both active and inactive volcanoes can be found in many places around
the world. They are also found in space. Jupiter’s moon Io is the first
moon or body other than Earth on which scientists have seen active
volcanoes. The volcanoes on Io are so powerful that they shoot out
many metric tons of material high into Io’s atmosphere each month
Volcanic eruptions may be classified as either quiet or explosive.
During a quiet eruption, lava flows freely thru vent or fissures.
Explosive eruptions shoot rocks, lava, gases, ash, and dust high into the
air. Different eruptions cause different types of volcanic cones.
Volcanic mountains are just really large volcanic cones
Three types of volcanoes
1. SHIELD CONE
A shield cone is made up of layers of hardened lava that build up to
form the cone. Shield cones form quiet eruptions. Characteristics of a
shield cone are a wide base and gentle slopes. Example; Mauna Loa in
Hawaii
2. CINDER CONE
A cinder cone is an explosive eruption. Dust, ash, and rock particles are
thrown out of the vent and settle to form the cone. Characteristics of a
cinder cone are steep sides and narrow bases. Example: Paracutin in
Mexico
3. COMPOSITE CONE
A composite cone is made up of lava and rock particles. It is formed
from a series of quiet and explosive eruptions. There are alternating
layers of lava and dust, ash, and rock particles. Characteristics of a
composite cone are a high cone with steep sides. Example: Mount St.
Helens, and Mount Hood in Oregon