GEOLOGY

Detailed explanation-1: -The law of superposition is one of the principles of geology scientists use to determine the relative ages of rock strata, or layers. This principle states that layers of rock are superimposed, or laid down one on top of another. The oldest rock strata will be on the bottom and the youngest at the top.

Detailed explanation-2: -Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.

Detailed explanation-3: -Geologists use the law of superposition and law of original horizontality to determine the relative ages of sedimentary rock layers. According to the law of superposition, in horizontal sedimentary rock layers the oldest is at the bottom. Each higher layer is younger than the layer below it.

Detailed explanation-4: -Explanation: The law of superposition logically states that the strata at a lower level is older than the strata above it. The cross cutting is younger than the strata that it cuts through. If the cross cutting is “cut” off at an higher level it indicates a period of erosion.

Detailed explanation-5: -The Law of Superposition says that within the layers of sedimentary rock, the youngest layer is at the top. As you go further, each layer below is older.