Limestone

Question 1

Where can limestone be found

Answer 1

The Burren
Yorkshire dales
North Yorkshire moors
Pean District
Brecon Beacons

Question 2

Whats Carbonation

Answer 2

It is when carbon dioxide from the atmosphere is dissolved into rain water which forms a weak carbonic acid. This acid then reacts with the limestone and dissolves it

Question 3

Whats solution

Answer 3

When the dissolved limestone is moved away from where it was dissolved

Question 4

Abrasion

Answer 4

Rocks rubbing together like sandpaper

Question 5

Whats freeze thaw

Answer 5

This is when water gets into the cracks of the rock and then freezes before melting again and relaxing. Over time this breaks off chunks of rock

Question 6

Whats formed at the bottom of cliffs

Answer 6

Scree slopes

Question 7

Whats an example of a swallow hole

Answer 7

Gaping gill

Question 8

How are swallow holes formed

Answer 8

As the water moves over the limestone it slowly dissolves it through solution/carbonation. This widens the cracks and can create holes on the surface. The swallow holes can be many metres deep leading to a series of underground features.

Question 9

What are resurgent streams

Answer 9

They are water which has travelled down through permeable limestone. It then reappears when it meets impermeable rock which it cant flow through. At this point the stream flows over the impermeable rock until it reappears at the surface as a spring. When it reappears its called a resurgent stream.