Radioactive dating of fossils

17 Apr

Since fossils are always found in sedimentary rocks these forms of radioactive dating can not be used in sedimentary layers.

Potassium and Uranium decay can not be used to directly date fossils.

While the oldest known rocks on Earth are about 3.5 billion years old, researchers have found zircon crystals that are 4.3 billion years old [source: USGS].

Based on the analysis of these samples, scientists estimate that the Earth itself is about 4.5 billion years old.

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Also any erosional loss of material or slight contamination would throw off any values. Molds, and casts are impressions in the rock containing no carbon.

Others like fossilized wood have had the organic material completely replaced by minerals.

Mineralization of organic material is very common in fossils.

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Radioactive dating can only provide indirect evidence for evolution.