For an explanation, see the main splats page
SPLATS about weathering and erosion
The principles of weathering and erosion
- In 1802, John Playfair wrote about geomorphology, giving us 'Playfair's Law', that rivers cut their own valleys, rather than following pre-existing routes.
- Rock minerals undergo both physical and chemical changes as they weather to form soil, with some of the soluble products being leached away by groundwater.
- When water with dissolved limestone evaporates, a stalactite or stalagmite may form, as soluble calcium hydrogen carbonate forms calcium carbonate.
- The loss of rocks from the surface of the earth is balanced by the uplift caused by tectonic forces and also volcanic eruptions.
- Rocks weather due to chemical effects caused mainly by the atmosphere and water. Erosion often exposes fresh surfaces to weathering.
- Erosion can be caused by wind, water or ice. Plants and animals can have more minor influences on weathering and erosion.
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