Cave Formations Carry Clues About Ancient Earthquakes

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Cave Formations Carry Clues About Ancient Earthquakes
Researchers have found that stalagmites can help determine if and when a region was struck by an earthquake.
 
By Ker Than
smithsonian.com
September 12, 2016
 

While exploring a pair of cave in Illinois in 2008, Samuel Panno noticed a peculiar thing: some of the stalagmites—rocky, cone-shaped formations that rise up from cave floors—had smaller, neighboring growths that were lighter in color, suggesting they had formed more recently.

Read more: https://www.smithsonianmag.com/science-nature/cave-formations-carry-clues-about-ancient-earthquakes-180960419/#T4XTFt20MUbu3ETZ.99