Types of volcano - By Nadia

Viscoscity

ØRefers to the stickiness of the lava

ØHigher viscosity refers to more sticky & dries faster

Therefore, lower viscosity refers to more fluid (water) & more ability to flow further

Shield

1.Gradient: gently sloping slopes to ensure that there is no blockage of the vent.

2.Height: shorter as compared to stratovolcano

3.Eruption: less violent

4.Viscosity: less viscous and has low silica content

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An example of shield volcano is Mauna Lua, Hawaii

Strato

1.Gradient: steep sloping slides

2.Height: taller as compared to shield volcanoes

3.Eruption: more violent (trapped gases)

4.Viscosity: more viscous, higher silica content

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An example is mount Mayon, Philippines