Question

the grand canyon was formed when a river cut through the rock layers. the process took 5-6 million years. according to the law of cross-cutting relationships, the ______________ is younger. choose relative dating means giving an absolute date determining which rock layers are older or younger without assigning a hard date

Explanation:

1. The Law of Cross-cutting Relationships states that a feature cutting through another (like a river cutting rock layers) is younger than the feature it cuts.
2. Relative dating focuses on the order of events (older/younger) without exact numerical dates.

Answer:

1. river (or the canyon/cutting feature)
2. B. determining which rock layers are older or younger without assigning a hard date