Tectonic Activity British Aisles

Question 1

Name a lava plateau

Answer 1

The Antrim plateau

Question 2

How is a lava plateau formed

Answer 2

This is a large upland flat area made when running lava erupted from cracks called fissures and flowed a long way before cooling down
It spread out, filled in dips and made a flat surface
Several eruptions happened over a long time period. This gave layers of basalt on top of each other.

Question 3

Name a basaltic column

Answer 3

Giants causeway

Question 4

What are they and how do they form

Answer 4

Tall thin blocks of basalt.
Some are hexagonal
It’s when the lava fills a dip in the ground, it makes a deep pool and cools more slowly than usual. As it cools the lava shrinks, and pulls inwards, making cracks. These are the edges of the basalt column.

Question 5

Name a Volcanic plug

Answer 5

Sleigh mountain

Question 6

What are volcanic plugs and how formed

Answer 6

Hills which rise steeply from the surrounding land.
Made when magma in a volcano cooled down inside the vent, and turned to rock called dole rite. This is harder than surrounding rock, so it is left sticking up when the other rock is worn away.