GENERAL GEOLOGY

Detailed explanation-1: -The principle of superposition states that in an undeformed sequence of sedimentary rocks, each layer of rock is older than the one above it and younger than the one below it (Figures 1 and 2). Accordingly, the oldest rocks in a sequence are at the bottom and the youngest rocks are at the top.

Detailed explanation-2: -Sedimentary rocks are also deposited one on top of the other. Rock layers are frequently referred to as Strata. Figure 2. Undeformed layer of sedimentary rock called strata. The oldest layer is at the bottom while the youngest layers are on top.

Detailed explanation-3: -law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.

Detailed explanation-4: -The volcanic ash layer is dated as 507 million years old. The fossil species below the ash must be slightly older than 507 million years, and the species above the ash must be slightly younger. If rocks in different places contain the same fossil species, they must be similar in age.