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Originally posted by Gibbon
Here is another link (from 2002) to Earlham College explaining the processes that cause sinkholes.
These boogers are well understood and have been ocurring for a long time. However, the Aryans may have just put there escape pods in high carbonate rock just so that we wouldn't notice when they all start leaving the planet.....just sayin
Since the bedrock in karst areas are typically limestone or dolostone, a reaction occurs with rainwater (which percolates down into the groundwater system). This reaction occurs because the water is mildly acidic (McKenzie et al, 2000). Carbonic acid, the most common acid in water, forms when water and carbon dioxide combine in the atmosphere (Carving Canada, 1995). Once the water reaches the bedrock, the chemical reaction begins. The acid then dissolves the carbonate minerals through this reaction:
CaCO3 + H2CO3 => Ca+2 + 2HCO3 -1
(Formula from McKenzie et al, 2000)
Originally posted by TruthxIsxInxThexMist
reply to post by Vincent84
Hmmmm. .. more sinkholes ay?
I'm betting these occur due to all the things we take from the Earth.... wouldnt surprise me one bit....
Recent sinkholes in Hillsborough and Polk counties have been attributed, in part, to heavy pumping of groundwater by farmers trying to protect their crops from freezing during unseasonably cold weather in early January.