Volcanic Landforms - Guide For Reading Page 4

Some types of volcanic activity do not involve the eruption of lava.

In geothermal activity, magma a few kilometers beneath Earth’s

surface heats underground water.

Types of geothermal activity that are often found in areas of

present or past volcanic activity:

1. Hot springs- groundwater is heated by magma or hot rock

deep underground, it rises to surface & collect in a natural

pools. Groundwater is water that has seeped into the spaces

among rocks deep beneath Earth’s surface. Dissolved gases

and other substances from within Earth are found in this

water.

2. Geyser – Rising hot water & steam is trapped in a narrow

crack. Pressure builds until the mixture sprays above the

surface in a fountain of water and steam erupting from the

ground. Ex. Old Faithful in Yellowstone National Park.

Geothermal Energy is a source of energy produced when magma

heats water. This can be used to heat homes, and as a source of

electricity (steam turns turbines).

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