Write about the Volcanoes and types of land form’s forms by volcanoes
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Landforms from Lava
Volcanoes and Vents
The most obvious landforms created by lava are volcanoes, most commonly as cinder cones, composite volcanoes, and shield volcanoes. Eruptions also take place through other types of vents, commonly from fissures (Figure 1). The eruptions that created the entire ocean floor are essentially fissure eruptions.
Lava Domes
Viscous lava flows slowly. If there is not enough magma or enough pressure to create an explosive eruption, the magma may form a lava dome. Because it is so thick, the lava does not flow far from the vent.Lava flows often make mounds right in the middle of craters at the top of volcanoes.
Lava Plateaus
A lava plateau forms when large amounts of fluid lava flow over an extensive area. When the lava solidifies, it creates a large, flat surface of igneous rock.
Land
Lava creates new land as it solidifies on the coast or emerges from beneath the water.Over time the eruptions can create whole islands. The Hawaiian Islands are formed from shield volcano eruptions that have grown over the last 5 million years.
Landforms from Magma
Magma intrusions can create landforms. Shiprock in New Mexico is the neck of an old volcano that has eroded away. The volcanic neck is the remnant of the conduit the magma traveled up to feed an eruption.
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