The principle of inclusions which states that the source of rock fragments found in a unit must be older than the unit with the fragments is important because______ .
A) it allowed geologists to correlate rock units over large distances
B) it provided a tool for sorting out the relative timing of various geologic events
C) it provided a way to recognize if rocks had been deformed
D) it showed that igneous rocks were younger than sedimentary rocks

Question

Quizplus · Accepted Answer

The principle of inclusions helps establish the relative timing of events by indicating which rock units are older or younger than others. By using this principle, geologists can sort out the chronology of geologic events. It is an essential tool in relative dating and correlation of rock units.

The Principle of Inclusions Which States That the Source of Rock