Igneous Landforms

Question 1

Intrusive igneous landforms cutting across rock layering

Answer 1

Discordant

Question 2

Intrusive igneous landforms ~parallel with rock layer

Answer 2

Concordant

Question 3

Layered igneous intrusion with a flat bulbous shape

Answer 3

Laccolith

Question 4

INTRUSIVE Examples

Answer 4

• Pluton
• Dike
• Sill
• Batholith

Question 5

EXTRUSIVE Examples

Answer 5

• Lava flows
• Pyroclastic Debris Deposits
• Volcanoes

Question 6

Two main types of eruptions?

Answer 6

• Effusive (magma wells out of the ground, forming lava flow)
• Explosive (magma fragments before it reaches a vent)

Question 7

Factors that determine the viscosity + speed of the lava flow ? (3)

Answer 7

• Composition (more silica = slower flow)
• Temperature (cooler = slower flow)
• Volatiles ( less gas = slower flow)

Question 8

2 TYPES of BASALTIC lava flows

Answer 8

• Pahoehoe

- A’a’