The Geo RoomGeomorphology

Definition of the Day
Glaze
A glassy coat of ice formed when rain water freezes on objects such as stems or wires. See Precipitation on Ground level

Human Impacts on Weathering


Source Wikimedia commons
Humans also play a crucial role in determining weathering type and or rate of weathering.

Industrial Activities

Gases from factories and vehicles release considerable amounts of carbon dioxide in the atmosphere which result in acid rain production.This acid rain has an effect on rocks such as limestone which lead to their decomposition.

Deforestation

Cutting down trees for commercial and non-commercial means more carbon dioxide remains unabsorbed which in turn results in more acidic rainfalls. Deforestation also exposes the rock to more agents of weathering such as high insolation which could lead to exfoliation.
Conversely, afforestation shelters the rock from agents of weathering and can also provide more humic acids for weathering.

Mining/Quarrying

The blasting effect to reveal mineral seems expose rocks to agents of weathering e.g pressure release. In some mineshafts rock bursts can occur dude to pressure release.

Veld Fires

Veld fires subject rocks to intense heat which can lead to thermal expansion or exfoliation.



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