For example, the grains within a sedimentary rock are older than the rock; a fragment of sandstone incorporated within a mudstone is older than the mudstone; a fossil bone found in a limestone is older than the limestone.

What is relative age simple?

1. n. [Geology] The approximate age determination of rocks, fossils or minerals made by comparing whether the material is younger or older than other surrounding material.

How is relative time recorded?

Relative time is recorded in rocks.