GENERAL GEOLOGY

Detailed explanation-1: -The four laws are the law of superposition, law of original horizontality, law of cross-cutting relationships, and law of lateral continuity.

Detailed explanation-2: -Steno’s final principle is the “principle of lateral continuity, ” which says that sediment layers spread out until they reach an obstacle that keeps them from spreading further, the way soup spreads out in a bowl until it reaches the sides of the dish.

Detailed explanation-3: -From his work in the mountains of western Italy, Steno realized that the principle of superposition in stratified (layered) rocks was the key to linking time to rocks. In short, each layer of sedimentary rock (also called a “bed”) is older than the one above it and younger than the one below it.

Detailed explanation-4: -Steno’s Principle of Lateral Continuity This principle allowed Steno to link identical rocks on opposite sides of a river valley and deduce the history of events (mostly erosion) that separated them. Today we apply this principle across the Grand Canyon-even across oceans to link continents that once were adjoined.