Absolute dating vs realtive dating

Scientists know that the layers they see in sedimentary rock were built up in a certain order, from bottom to top.

When they find a section of rock that has a lot of different strata, they can assume that the bottom-most layer is the oldest and the top-most layer is the youngest.

We'll explore both relative and numerical dating on our quest to understand the process of geological dating.

He could be pretty confident that his super awesome dinosaur was about 175 million years old.

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