Wednesday, June 22, 2016

Pietà, Malta

Focus on Ta' Braxia Cemetery: Ever wonder why granite is the most popular stone for memorials? Here's what happens to limestone. Physical geographers recognize this as chemical weathering. All rainfall is just slightly acidic (as a result of the carbon dioxide in the atmosphere). When an acid finds a base (in this case, calcium carbonate), carbonation occurs and the limestone slowly dissolves away. Limestone accounts for virtually all of Malta's geology. [2009]

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