Igneous Landforms Flashcards
1
Q
Intrusive igneous landforms cutting across rock layering
A
Discordant
2
Q
Intrusive igneous landforms ~parallel with rock layer
A
Concordant
3
Q
Layered igneous intrusion with a flat bulbous shape
A
Laccolith
4
Q
INTRUSIVE Examples
A
- Pluton
- Dike
- Sill
- Batholith
5
Q
EXTRUSIVE Examples
A
- Lava flows
- Pyroclastic Debris Deposits
- Volcanoes
6
Q
Two main types of eruptions?
A
- Effusive (magma wells out of the ground, forming lava flow)
- Explosive (magma fragments before it reaches a vent)
7
Q
Factors that determine the viscosity + speed of the lava flow ? (3)
A
- Composition (more silica = slower flow)
- Temperature (cooler = slower flow)
- Volatiles ( less gas = slower flow)
8
Q
2 TYPES of BASALTIC lava flows
A
- Pahoehoe
- A’a’
