According to the law of superposition, which layer is the oldest? Youngest? In sector 3, stratum D looks like it disappears. Which law makes you expect to find stratum D in sector 3? What could explain the absence of stratum D from sector 3?
What law suggests that the rock strata in the graphic did not go through any geologic processes after deposition because the strata are flat?

Examine the new graphic above. According to the law of cross-cutting relationships, which layer is oldest in sector 2? Youngest in sector 2?