The law of superposition states:
rock layers closest to the bottom are the newest
rock layers closest to the surface are the newest
rock layer vertical placement has no bearing on the layer's age

What factors did the founders of your state use to determine the states boundaries ? did you states founders choose boundaries based on physical features or lines longitude and latitude ?

According to the earth science reference tables, during which geologic time period were the continents of north america, south america, and africa closest together?

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)