During heavy earthquackes sand can behave as liquid and lose the capacity to bear weight causing catastrophic destruction.
But apparantly it can sink cities into the ground or water:Survivors of the New Madrid [Missouri, 1811]earthquakes reported not only intense ground shaking and land movement, as would be expected during an earthquake, but also an unfamiliar phenomenon: water and sand spouting up through fissures, or cracks, in the Earth’s surface. In a letter published in Lorenzo Dow’s Journal, New Madrid resident Eliza Bryan wrote in 1816:
. . . the surface of hundreds of acres was, from time to time, covered over in various depths by the sand which issued from the fissures, which were made in great numbers all over this country, some of which closed up immediately after they had vomited forth their sand and water . . . "
"...the fluid comes shooting to the surface.” These fountains of water can sometimes shoot as high as 30 feet into the air, according to Tuttle."
Could we think of more mysteries that could be solved by liquifaction?Two cities that lay at the edge of the Mediterranean more than 1,200 years ago, Herakleion and Eastern Canopus, disappeared suddenly, swallowed by the sea. Now, an international team of scientists may have figured out the mystery of why it happened.
The researchers have concluded that the two cities collapsed when the land they were built on suddenly liquefied.
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