Lava Flashcards

1
Q

Two types of lava

A

Basaltic and acid lava

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2
Q

Where does basaltic lava come from

A
  • Originate from upward movement of mantle material

- Most common along spreading ridges, also hotspots and developed ridge systems

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3
Q

What is the nature of basaltic lava

A
  • Gas bubbles have freedom to expand = fluid eruption and free flowing
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4
Q

What is basaltic lava made of

A

Dominated by iron and manganese + low in silica

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5
Q

What is acid lava made of

A

Rich in silica

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6
Q

What is the nature of acid lava

A

Viscous = gas bubbles struggle to expand = build up of pressure and violent eruptions

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7
Q

Where is acid lava eruptions found

A

Destructive margins (andesitic) and collision margins (ryalitic)

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