They named it Jones County after John Paul Jones, the early American Naval hero who rose from humble Scottish origin to military success during the American Revolution. Ellisville, the county seat, was named for Powhatan Ellis, a member of the Mississippi Legislature who claimed to be a direct descendant of Pocahontas.
An avalanche occurs when the stress (from gravity) trying to pull the snow downhill exceeds the strength (from bonds between snow grains) of the snow cover. Four conditions must be present for an avalanche to occur: 1  a steep slope. 2  a snow cover. 3  a weak layer in the snow cover. 4  a trigger.
Image credit: NASA. The two main answers to âhow earthquakes happenâ is: as a result of tectonic plates colliding and volcanic eruption. The shock waves associated with nuclear weapons testing and other man-made explosions. To be considered an earthquake a shock wave has to be of natural origin.Earthquakes Caused By Tectonic Plates: The theory of plate tectonics explains how the crust of the Earth is made of several plates, large areas of crust which float on the Mantle.Since these plates are free to slowly move, they can either drift towards each other, away from each other or slide past each other.Many earthquakes happen in areas where plates collide or slide past each other. The Elastic Rebound Theory applies to these quakes.ince these plates are free to slowly move, they can either drift towards each other, away from each other or slide past each other. Many earthquakes happen in areas where plates collide or slide past each other. The Elastic Rebound Theory applies to these quakes.