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Carbon-14 is a good isotope to use to date fossils and rocks that are
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
A fault, folding, tilting, intrusions or extrusions are
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
Radioactive isotopes are used to date rocks and fossils because
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
An unconformity is
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
Earth's current atmosphere
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
A sample containing 25% Potassium-40 and 75% Argon-40 has gone through
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
Most of the rocks found in Western New York are from the geologic time period know as
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
When examining layers of rocks, the oldest layer can be found
less than 50,000 years old
2 half-lives
evolved from oxygen producing bacteria 3 billion years ago
They decay at a predictable rate
Devonian
missing layers due to weathering and erosion
on the bottom
younger than the layers they cut
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