Metamorphic rocks

Question 1

Metamorphic rocks were once

Answer 1

Sedimentary or Igneous rocks and were trasformed under great heat and pressure or transformed under

Question 2

The three types of metamorphism

Answer 2

1. Thermal/contact
2. Regional
3. Dynamic

Question 3

Explain thermal/contact metamorphism

Answer 3

When rocks are transformed by intense heat alone, Magma or lava cooking rocks it comes into contact with in areas of volcanic activity

Question 4

What are rocks formed by thermal/contact metamorphism known as

Answer 4

Aureoles

Question 5

Explain regional metamorphism

Answer 5

When rocks are transformed as a result of both heat and high pressure, during folding as a result of pressure from colliding plates

Question 6

Explain dynamic metamorphism

Answer 6

When rocks are transformed by high pressure alone, when pieces of crust slip past each other or in opposite directions causing deformation

Question 7

Describe the features of marble

Answer 7

Coarse- grained, crystalline rock originally limestone

Question 8

What colour is pure marble and how can this be altered and where can two variations be found

Answer 8

A) Pure limestone is white
B) Different chemical compositions give variations
C) Serpentine gives green carbon gives dark grey iron oxide gives pink
D) Green is found in Connemara and Black is found in Kilkenny

Question 9

What is the use of marble

Answer 9

Ornamental purposes (worktops and fireplaces)

Question 10

How is marble formed

Answer 10

Through thermal metamorphism when plates collide and limestone is subducted on entering the mantle magma rises and surrounds the limestone rapidly changing it into marble

Question 11

Characteristics of quartzite

Answer 11

Hard, non-porous and erosion resistant originally was sandstone

Question 12

What colour is quartzite

Answer 12

White or grey

Question 13

How is quartzite formed

Answer 13

Crystallised after the spaces between the sand grains were filled with silica

Question 14

Where can you find quartzite in Ireland

Answer 14

At the summit of the sugar loaf

Question 15

Characteristics of slate

Answer 15

Fine-grained rock splits into layers easily originally shale

Question 16

Colour of shale

Answer 16

Dark grey or black

Question 17

Use of shale

Answer 17

Roofing

Question 18

Where can shale be found in Ireland

Answer 18

Valentia co. Kerry

Question 19

Use of quartzite

Answer 19

To surface roads