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.

How would you describe your relative age?

Relative age is the age of a rock layer (or the fossils it contains) compared to other layers. It can be determined by looking at the position of rock layers. Absolute age is the numeric age of a layer of rocks or fossils. Absolute age can be determined by using radiometric dating.

What do you mean by something is relative?

adjective [usually verb-link ADJECTIVE] If you say that something is relative, you mean that it needs to be considered and judged in relation to other things. Fitness is relative; one must always ask Fit for what? Truth is relative.