Anonymous
10/19/2019 (Sat) 23:30:29
Id: a4deb9
No.925
del
i'm reading about the New Madrid earthquakes of 1811/1812. There were geysers of sand called sand blows caused by liquefaction of glacial sand beneath the surface and the weight of the surface crust being jiggled around on top and weighing down on the liquid sand layer.