Question

if geologists find a rock that cuts through three layers of rock, which of stenos principles will they use to determine which rock is the youngest? support your answer with evidence from the text.

Explanation:

Steno's principle of superposition states that in an undisturbed sequence of sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top. The principle of cross - cutting relationships states that a rock or feature that cuts through other rocks is younger than the rocks it cuts through. Since the rock in question cuts through three layers of rock, by the principle of cross - cutting relationships, it is the youngest.

Answer:

The rock that cuts through the three layers of rock is the youngest, supported by Steno's principle of cross - cutting relationships.