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Limestone regions
river and erosion
Term | Definition |
---|---|
Pillars | Stalactites and stalagmites continue to grow until theu join to form columns or pillars |
Hydrolisis | Is a form of chemical weathering where water reacts with chemicals in the rock and breaks them down |
Carbonation | Is one of the most common forms of chemical weathering.Rainwater absorbs carbon dioxide as it falls through the atmosphere. |
Solution | The river can dissolve ceretain rocks over which it flows, e.g Limestone or Chalk. |
Vertical Erosion | The river cuts down vertically by eroding its bed |
Lateral Erosion | The river widens its channel by erodinbg its banks |
Siltation | When the river has to much load to carry and it has to drop it on its bed |
Abrasion | Where the river uses its load to chip away at its bed and banks |
Deposition | When a river loses energy, volume or becomes overloaded it has to drop its load |
Free | |
A stalagtite | An ickle-like mineral formation that hangs from the ceiling of a cave |