Igneous Rock Processes

Question 1

Define Igneous rock
(example x2)

Answer 1

rock that is formed by the cooling and solidifying of molten magma or lava
E.g - Basalt and granite

Question 2

What is the difference between magma and lava

Answer 2

Magma is underground where as lava is above the ground on the surface

Question 3

What is magma

Answer 3

Magma is extremely hot liquid and semi-liquid rock located under Earth’s surface

Question 4

What is lava

Answer 4

Lava is molten rock ejected by volcanoes in the form of liquid above ground.

Question 5

What is a batholith

Answer 5

a type of igneous rock that forms when magma rises into the earth’s crust, but does not erupt onto the surface

Question 6

How are granite batholiths formed

Answer 6

• Large volume of magma rises into Earths
  crust
• The magma does not erupt
• The magma cools and solidifies into
  granite usually

Question 7

What does hydrothermal mean

Answer 7

Hot water

Question 8

Explain how Hydrothermal metal ores are deposited

Answer 8

• Hot magma rises through the crust
• Water in surrounding rocks becomes
  super heated
• Metals & minerals go into solution
  (dissolve)
• Hot water moves away from the magma
  along fractures
• Water cools as it moves away from magma
• Minerals & metals precipitated out of
  solution at different temps

Question 9

What is a hydrothermal metal ore

Answer 9

Accumulations of valuable minerals which formed from hot waters circulating in Earth’s crust through fractures

Question 10

What are four examples of metals that are deposited during hydrothermal deposition

Answer 10

• gold
• silver
• tin
• copper