Extrusive landforms

Question 1

Geysers?

Answer 1

Hydrothermal explosion resulting from surface water being heated by rocks and warmed by magma underneath, water boils and becomes pressurized to spray out of vents e.g. Yellowstone

Question 2

Hot spring?

Answer 2

Geothermally heated groundwater e.g. frying pan lake,NZ

Question 3

Boiling mud

Answer 3

Geothermal areas with little water have water mix with ash and clay e.g. Salton sea,California

Question 4

3 Fissure characteristics

Answer 4

Near flat and featureless basaltic slopes
Effusive high temperature lava
Divergent plate Boundaries e.g. Antrim,Northern Ireland

Question 5

3 Shield volcano characteristics

Answer 5

Gently sloped sides
Low viscosity lava
High temperature

Question 6

3 Dome/shield characteristics

Answer 6

Circular mound shape
Highly viscous lava
Acidic lava cools quickly at exposure to air creating steep sides

Question 7

2 Ash + Cinder cones characteristics

Answer 7

Steep conical shape

Vent filled with rock fragments

Question 8

2 Composite cones characteristics

Answer 8

Volcano that releases ash then lava

Explosive Rhyolitic/Andesitic

Question 9

Caldera

Answer 9

Build up of gases cause explosions extreme enough to cause the sides of the dome to subside