The Artstor website will be retired on Aug 1st. Proceedings of the American Philosophica... Proceedings of the American Philosophical Society Vol. 11, No. 81, Jan., 1869 On the Geological Age and ...

The Artstor website will be retired on Aug 1st. Proceedings of the American Philosophica... Proceedings of the American Philosophical Society Vol. 61, No. 4, 1922 The Age of the Earth from the ...

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Over 700 million years ago, Earth experienced a dramatic climate event known as the Sturtian glaciation, one of the most ...

You have full access to this article via your institution. By about 1860, a relative geological timescale was established based on the vertical succession of fossils, reflecting the sequence of ...

After all, the ever-changing Earth rarely left a complete geological record. The age of the planet, though, was important to Charles Darwin and other evolutionary theorists: The biological ...

There are three general approaches that allow scientists to date geological materials and answer the question: "How old is this fossil?" First, the relative age of a fossil can be determined.

After all, the ever-changing Earth rarely left a complete geological record. The age of the planet, though, was important to Charles Darwin and other evolutionary theorists: The biological ...

For 600,000 years during the tail end of the Miocene epoch, the Mediterranean was a dried-up salt plain cut off from the Atlantic Ocean. Around 5.3 million years ago, the eastern and western ...