Types Of Volcanos

Question 1

Dome Volcanos- Destructive

Answer 1

Lava flows from a central vent

Acid lava quickly solidify

Steep sided, convex cone

Volcanos is made up of many layers

E.g mt St Helens, USA

Question 2

Ash and cinder cones- Destructive

Answer 2

Fine ash and cinder is ejected from a central vent

Layers of ash and cinder built up

Shallow sided, concave sides

Volcano is made up of many layers

E.g Mt Etna, Italy

Question 3

Caldera Volcano- Destructive

Answer 3

Gas builds up in the magma chamber causing an explosion

The sides of the crater upside

Craters can be flooded by the sea, creating lagoons

E.g Mt Mazama, USA

Question 4

Fissure Eruptions- Constructive

Answer 4

When two plates move apart lava is ejected through fissures

Normally compromised by basalt

Lava fills up hollow rather than creating dome shape

The slow cooling of lava produces columnar jointing

E.g GiantsCauseway, N Ireland

Question 5

Sheild Volcanos- Constructive

Answer 5

Lava flows from a central vent

Lava spreads over a large area before solidifying

Results in a cone with long gentle sides

Volcano is made up of many layers

E.g Mauna Loa, Hawaii