Volcanoes and Dykes

Question 1

Earth

Answer 1

• magma rises through cracks in the crust: dykes
• hotspot volcanoes - plate motion from tectonics

Question 2

Venus

Answer 2

• too hot for tectonics
• too hot for volcanism
• magma doesn’t rise - remains sutck under ‘squidgy’ crust

Question 3

Mars

Answer 3

• lots of volcanoes (HUGE)
• ex: olympus Mons - 3 billion yrs old
• magma is deep in crust - deep dykes
• no plate motion
• enhances groundwater stage