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Time Equivalency
The concept of dating geological layers or events as being the same age based on the evidence of similar rocks, fossils, or geologic features.
Geology
A field of study focused on understanding the Earth's physical makeup, its history, and the natural processes that influence its structure and composition.
Isotopic Ages
Measures the time elapsed since a particular mineral or rock formed, based on the decay rates of radioactive isotopes.
Billion Years
A period of time equal to 1,000 million years, often used in geological and astronomical contexts to describe the age of Earth or the universe.
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