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So, instead of saying when something happened, it puts events in the order they happened.
So, basically it's the difference between saying 'I'm 25 years old, and my sibling is 20 years old' and 'I'm older than my sibling.' Geologists use a variety of techniques, or principles, to determine the relative age of a rock unit.
We'll explore both relative and numerical dating on our quest to understand the process of geological dating.
Along the way, we'll learn how stratigraphic succession and radioactive decay contribute to the work of paleontologists.
In a way this field, called geochronology, is some of the purest detective work earth scientists do.
And, what about other findings like fossil fish, plants and insects?
ANSWER: Relative dating is used to determine the relative ages of geologic strata, artifacts, historical events, etc.
Say for example that a volcanic dike, or a fault, cuts across several sedimentary layers, or maybe through another volcanic rock type.
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Fossils occur on every continent and on the ocean floor.