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Геохимия, лекции 8-14 / 09_Изотопная_геохимия_4.ppt
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A False Assumption

Elizabeth K. Ralph and Henry M. Michael, “Twenty- five Years of Radiocarbon Dating,” American Scientist, Sep/Oct 1974

“We know that the assumption that the biospheric inventory of C14 has remained constant over the past 50,000 years or so is not true.”

The assumption carbon-14 dating is based upon is FALSE

Conflict in Dating

In 1993 scientists found wood (trees) buried in basalt flows (69 feet deep)

Wood samples sent to two laboratories to be carbon-14 dated

44,000 years

Basalt sent to two laboratories to be potassium-argon dated

45,000 million years

69 feet deep

Wood encased in basalt

Evidences for a Young Earth

Helium in the Earth’s atmosphere

Nuclear decay rates (Radioisotope dating)

Sodium in the oceans

Rapid disintegration of comets

Erosion of continents

Sediments in the ocean

Decay of the Earth’s magnetic

Carbon-14 ratio in the atmosphere

Radiohalos for polonium in

Population statistics

Recession of the moon

Many more …..