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Transcript of Groundwater
How can a rock hold water?
As some rocks are exposed to groundwater they slowly dissolve and later redeposit minerals. Areas that contain a large amount of features formed by this process are described as having karst topography.
The overuse of groundwater in Arizona has resulted in land subsidence of several meters.
What is this?
Hot springs and geysers occur where groundwater is heated deep within the Earth or by volcanic activity.
Groundwater is the largest volume of water on Earth that is not frozen or salty.
Groundwater takes up space in sediments and rocks and acts as a support. When the water is withdrawn the material may compact. This process is known as subsidence.
This picture shows an area of California that has subsided more than 25ft. due to the use/removal of groundwater.
A geyser is a type of hot spring that occasionally shoots columns of hot water and steam into the air.
- Water that enters and is stored in the ground
Aquifer: a layer of rock that can store water and allows groundwater to flow