Lithology

Question 1

What is lithology?

Answer 1

Physical characteristics of rocks

Question 2

Examples of igneous

Answer 2

Ganite
Scoria
Pumice
Obsidian

Question 3

Sedimentary rock examples

Answer 3

Sandstone
Limestone
Shale

Question 4

Metamorphic rock examples

Answer 4

Marble
Slate

Question 5

Mohs hardness scale

Answer 5

The relative hardness of rocks can be measured using mohs hardness scale. It worked by seeing if the rock or mineral would be damaged by another object

Question 6

Hardest 3 rocks and least hard 3 rocks according to Mohs hardness scale

Answer 6

Hardest:
Diamond
Corundum
Topaz
Weakest:
Talc
Gypsum
Calcite

Question 7

Igneous rate of erosion and explanation

Answer 7

Slow erosion
Igneous rocks are crystalline- the interlocking crystals make strong, hard erosion resistant rock
Few joints so there is a weakness that erosion can exploit

Question 8

Metamorphic erosion rate and explanation

Answer 8

Very slow erosion- crystalline metamorphic rocks are resistant to erosion
Many metamorphic rocks exhibit a feature called foliation, where crystals are all oriented in one direction which produces weaknesses
Folded and heavily fractured- weaknesses that erosion can exploit

Question 10

How does permeability affect rocks erosion rate?

Answer 10

Pore space allows water within a rock.
Water is a heavy substance making the rocks have more pressure on the rock causing it to crack. Also, gravity can break down the rock causing mass movement