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The topic of geologic time and techniques and tools to measure geologic time, including radiometric dating techniques.
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Non-profit scientific research institution dedicated to establishing the history of the Earth, its various inhabitants, and its interactions with the rest of our Solar System, throughout the 4.6 billion years of our Planet's existence.
USGS on-line publication about the relative and radiometric geologic time scales, age of the earth, index fossils, and related topics.
Lecture notes on different methods of measuring geologic time.
Geologic time scale with links for each time interval.
USGS on-line publication about the relative and radiometric geologic time scales, age of the earth, index fossils, and related topics.
Geologic time scale with links for each time interval.
Lecture notes on different methods of measuring geologic time.
Non-profit scientific research institution dedicated to establishing the history of the Earth, its various inhabitants, and its interactions with the rest of our Solar System, throughout the 4.6 billion years of our Planet's existence.

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