Based on the principle of Superposition, we know that, in a sequence of strata, the following relative age is right:

a. A layer of sediment should be the same age as its adjacent one
b. The youngest bed is on the bottom
c. Younger strata above older strata
d. Each layer of sediment must be older than the one below


Answer: c. Younger strata above older strata

Environmental & Atmospheric Sciences

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