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24-Jul-2015 08:07

The Principle of Superimposition states that the oldest rocks will be at the bottom of all layers.When geologists study layers of rocks, they get a glimpse of the past.Determining the precise way that sedimentary rocks have layered throughout time gives them insight into how natural events have occurred.This means that it can be assumed that non-horizontal layers were somehow disturbed after they were originally laid, as with tilting or folding.The Principle of Lateral Continuity supposes that rock layers extend for some degree over the Earth's surface. In stratigraphy terms, this allows layers to be compared against each other.Geology, or the study of rocks, can be a fascinating way to learn about the Earth's history.

These concepts have also built scientists' perception of the Earth and its development since the beginning of time.

The principles are as follows: The Principle of Original Horizontality is a relatively simple concept: it states that sediments laid down on the Earth's surface will form even horizontal layers.