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Flashcards in Intrusive Deck (13)
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1

What is a dormant volcano? (Intrusive tectonics)

If it has not erupted for years but sometimes seeps gas

2

What is an extinct volcano? (Intrusive tectonics)

If it has not erupted for thousands of years and has been weathered

3

What is an intrusive feature? (Intrusive tectonics)

Magma cools and solidifies into igneous rock below the earths surface

4

What kind of crystals does slow cooking produce? (Intrusive tectonics)

Larger crystals e.g granite

5

What is a Dyke? (Intrusive tectonics)

•Solidified magma often forms into groups called swarms
•highly resistant
•thin, tall

6

What is an example of a dyke? (Intrusive tectonics)

Isle of mull

7

What is a Sill? (Intrusive tectonics)

•magma solidifies in strata (layers)
•when exposed to erosion they form steep sided cliffs

8

What is an example of a sill? (Intrusive tectonics)

Great whin sill

9

What is a Laccolith? (Intrusive tectonics)

•formed when viscous magma forces the underlying rock to strata
•looks like a dome

10

What is an example of a Laccolith? (Intrusive tectonics)

Eildon Hills

11

What is a Batholith? (Intrusive tectonics)

•Most other features feed off this before it solidifies
•exposed to extreme heat which alters adjacent rock

12

What is an example of a batholith? (Intrusive tectonics)

Dartmoor

13

What is an active volcano?(intrusive tectonics)

If it has erupted recently and is likely to do so again