Volcano Formation and Types
When tectonic plates move away from each other magma flows up and creates an island and possibly a volcano. When the volcano forms over a hotspot it will erupt when there is too much pressure over the build up gas in the volcano so it will explode out the top. The higher the silica in the magma/lava it has, the more it will explode violently. It the tectonic plates more over time the hotspot will move too which means some active volcanoes will not be active anymore because there is nothing fueling it. So then other islands and volcanoes will form since the hotspot moved.
When tectonic plates move away from each other magma flows up and creates an island and possibly a volcano. When the volcano forms over a hotspot it will erupt when there is too much pressure over the build up gas in the volcano so it will explode out the top. The higher the silica in the magma/lava it has, the more violently it will explode. If the tectonic plates more over time the hotspot will move too which means some active volcanoes will not be active anymore because there is nothing fueling it. So then other islands and volcanoes will form since the hotspot moved.
Types of volcanoes:
Cinder cone- This is the most common , and shortest type of volcano. The height of the cone can reach anywhere from 250 Cinder Cones are formed when lava is shot into the atmosphere and cools around the central vent, forming a cone shape. Small bits of lava get shot into the air, cool, and form pebble-sized pieces of rock, called cinders. These cinders collect around the central vent when they fall to the ground again.
Shield- Shield volcanoes have a less explosive eruption and tend to flow down the side of the volcano rather than explode from them. This causes the lava to harden over the top of the volcano which makes the volcano “grow” in size. They are known for their large size that looks like a warrior's shield but low profile. The Mauna Kea volcano is the world’s largest volcano and it is bigger than Mt. Everest since it extends below sea level. Shield volcanoes’ lava flows can for miles.
Strato/Composite- Strato volcanoes are most common at subduction zones, which form volcano chains along plate boundaries where oceanic crust goes under continental crust. These volcanoes are the most dangerous to human civilization because of their explosive eruptions. They have killed lots of people throughout the past.
When tectonic plates move away from each other magma flows up and creates an island and possibly a volcano. When the volcano forms over a hotspot it will erupt when there is too much pressure over the build up gas in the volcano so it will explode out the top. The higher the silica in the magma/lava it has, the more violently it will explode. If the tectonic plates more over time the hotspot will move too which means some active volcanoes will not be active anymore because there is nothing fueling it. So then other islands and volcanoes will form since the hotspot moved.
Types of volcanoes:
Cinder cone- This is the most common , and shortest type of volcano. The height of the cone can reach anywhere from 250 Cinder Cones are formed when lava is shot into the atmosphere and cools around the central vent, forming a cone shape. Small bits of lava get shot into the air, cool, and form pebble-sized pieces of rock, called cinders. These cinders collect around the central vent when they fall to the ground again.
Shield- Shield volcanoes have a less explosive eruption and tend to flow down the side of the volcano rather than explode from them. This causes the lava to harden over the top of the volcano which makes the volcano “grow” in size. They are known for their large size that looks like a warrior's shield but low profile. The Mauna Kea volcano is the world’s largest volcano and it is bigger than Mt. Everest since it extends below sea level. Shield volcanoes’ lava flows can for miles.
Strato/Composite- Strato volcanoes are most common at subduction zones, which form volcano chains along plate boundaries where oceanic crust goes under continental crust. These volcanoes are the most dangerous to human civilization because of their explosive eruptions. They have killed lots of people throughout the past.