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Types of Lava

Volcanoes can be classified based on their shape, size, and ejected materials. The type of lava, whether basic or acidic, determines the shape of the volcano. Basic lava is low in silica, mobile, and flows over long distances in thin sheets. Acidic lava is high in silica, viscous, solidifies quickly, and does not flow far. The document provides information on types of volcanic cones and includes links to videos about Hawaiian volcanoes that eject basic lava and viscous/explosive eruptions.

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Isabella persad
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130 views4 pages

Types of Lava

Volcanoes can be classified based on their shape, size, and ejected materials. The type of lava, whether basic or acidic, determines the shape of the volcano. Basic lava is low in silica, mobile, and flows over long distances in thin sheets. Acidic lava is high in silica, viscous, solidifies quickly, and does not flow far. The document provides information on types of volcanic cones and includes links to videos about Hawaiian volcanoes that eject basic lava and viscous/explosive eruptions.

Uploaded by

Isabella persad
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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1

Form Four Geography


Teacher: Miss Sookram
Types of Lava
Volcanoes are classified according to their shape, their size and the nature of the
materials ejected. The type of lava may be basic or acidic, this determines the
shape of the volcano.
Basic lava is low in silica (40%), mobile and flows in a liquefied state, mostly in
thin sheets, for long distances.
Acidic lava is high in silica (65%) and is viscous and relatively immobile,
solidifying quickly at the surface.
2

Types of volcanic cones


Diagram1.
3

Diagram 2:

https://www.youtube.com/watch?v=OcIQiI_Yfg4

Hawaii volcanoes (Basic Lava)


https://www.youtube.com/watch?v=NGcbNn4Vk1w

Viscous or explosive eruption


4

Read the information above and complete the table. Keep the handout for your
notes.

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