Lecture 1

Question 1

Exposure

Answer 1

Volcanic - by volcanic eruption

Intrusive- exposed by uplift, erosion, glaciation

Question 2

Environments

Answer 2

1. Extrusion(volcanic)
2. Intrusive (plutonic)
3. Hypabyssal-shallow intrusive rocks (less than 1 km deep)

Question 3

Plutonic/Intrusive

Answer 3

Crystallized deep in earth crust.
Coarsed or med sized grains.

Question 4

Volcanic/Extrusive

Answer 4

Crystallized at the surface.
Fine grained, glassy, volcanic rock.

Question 5

Hypabyssal/Sub-Volcanic

Answer 5

Crystallized at shallow depths. Less than 1km. Fine grained to glassy.

Question 6

Solidus

Answer 6

Temp below which there is no liquid

Question 7

Liquidus

Answer 7

Temp above which there is no solid

Question 8

Causes of magma Melting

Answer 8

1.isothermic decomposition
2. Addition of water
3. Add heat