Lithology- COASTS

Question 1

What is lithology?

Answer 1

Geological structure of the rocks. (There are 5)

Question 2

What are the 5 types of structure for lithology?

Answer 2

• Strata
• Bedding planes
• Faults
• Joints
• Dip

Question 3

Strata

Answer 3

Layers of rock

Seen in Dorset coast

Question 4

Bedding planes

Answer 4

Horizontal natural breaks in the strata. Caused by gap in time during periods of rock formation

Seen in Holderness

Question 5

Faults

Answer 5

Stress of pressure causes fractures

Holderness

Question 6

Joints

Answer 6

Vertical fractures caused either by contraction as sediments dry out, or by earth movements during uplift.

Question 7

Dip

Answer 7

refers to the angle at which the rock strata lie ( horizontaltally, vertically, dipping towards the sea, or dipping inland)

Question 8

Folds

Answer 8

Formed by pressure during tectonic activity which makes rocks buckle and crumple, for ex the Lulworth crumple

Question 9

Lithology in a question

Answer 9

Lithology would be used as a factor of rate of retreat

Question 10

Differential Erosion

Answer 10

Alternating strata in cliffs are due to varying rates of permeable and resistant rock which will form less prominent and weaker cliffs profile as they erode more easily.