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In this activity, students begin a sequencing activity with familiar items — letters written on cards.

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Name: Radiocarbon dating Material used: Organic remains such as wood and seeds Age range: Younger than 60,000 years ago How it works: Measures the amount of radioactive carbon-14 in the organic remains of living things Name: Fission track dating Material used: Volcanic glass, zircon and other crystals Age range: 10,000 to 500 million years ago How it works: Measures radioactivity by counting tracks left in crystals by decaying uranium atoms Name: Optically stimulated luminescence (OSL) Material used: Wind-blown sediment with lots of quartz or feldspar mineral grains Age range: Younger than 100,000 years ago How it works: Measures radiation that the mineral receives after it has been buried away from light Name: Fossil correlation Material used: Fossils Age range: All ages How it works: Fossils found in an undated rock are matched to similar fossils found in rocks that have been dated in other places Layer 1: Mudstone – sediments laid down in deep water.

Fossils include the belemnite Belemnopsis aucklandica. Which dating method is best for rocks with fossils in?

These assessments will test you on the following: Learn more about relative dating by reviewing the lesson, What is Relative Dating?

- Law of Superposition, Principles of Original Horizontality & Cross-Cutting Relationships.

Which dating method is best for volcanic ash containing crystals of zircon?

Last modified 17-Jan-2020 06:38