chp 10 2 notes groundwater erosion deposition n.
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Chp 10.2 Notes Groundwater Erosion & Deposition. Main Idea: Landforms caused by the chemical weathering of limestone are called karst topography . Two Requirements for Karst Topography!. ACIDIC WATER IS FORMED BY a CARBONATION PROCESS: Describe:

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chp 10 2 notes groundwater erosion deposition

Chp 10.2 NotesGroundwater Erosion & Deposition

Main Idea:Landforms caused by the chemical weathering of limestone are called karst topography.

two requirements for karst topography
Two Requirements for Karst Topography!

ACIDIC WATER IS FORMED

BY a CARBONATION PROCESS:

Describe:

Water drips down through soil and reacts with carbon dioxide. This creates carbonic acid, a relatively weak acid.

ACIDIC RAIN

WATER

Limestone (Rock) +

when the two meet
When the two meet

Action:

Carbonic acid dissolves limestone slowly, over a long period of time.

the structures formed
The Structures formed

LIMESTONE PAVEMENT

Describe:

An area of limestone that has been chiseled away and is exposed at earth surface

shallow hole
Shallow hole

Describe:

A hole that forms and “swallows” a stream as underground limestone is dissolved

sinkhole hint avoid limestone regions
Sinkhole (hint: Avoid Limestone regions!!)

Describe:

Rainfall in the soil absorbs carbon dioxide &reacts with decaying vegetation, creating acidic water. Acidic water moves through spaces underground, SLOWLY dissolving limestone, creating cavities. Cavities gradually get enlarged & carry even more acidic water. Sinkholes formed when the land surface above finally collapses by gravity & then sinks into the cavities.

stalactites don t fall hang on tite
Stalactites (“don’t fall, hang on tite!”)

Describe:Hollow, elongated forms of various

minerals deposited from solution by slowly dripping water. They hang from a cave ceiling.

stalagmites
Stalagmites

Describe: Cones or massive mounds of calcite deposits that grow up from a cave floor due

to dripping water.

speleothems
Speleothems

Describe: Known as “decorative cave formations”. Threads of deposited minerals that hang from a cave ceiling and sprout from a cave floor as a result of dripping water.