An example of such an event can be when the Civil War ended. The country went back to the gold standard and destroyed large sums of civil war money which was useless now. This led to a major deflation because there was suddenly much less money than before and the money had higher value than before.
Geographic isolation could be caused by a number of environmental factors. If a population of people or species live on an island, amongst mountains, in difficult to navigate terrain, or deep into rainforest or forests generally these groups could experience geographic isolation. Geographic largely occurs if a population or group of people or animals live in a remote region of the world that has little access to others due to any number of geographic features.
Each house must have the approval of the other to adjourn true if the governor's veto results in the bill being passed by a 3/5 vote in each house the bill will be a law