Radiometric dating exam questions
K-Ar and Ar-Ar can result in negative ages when atmospheric argon is considered.So if these are real dates then you can hold a rock in your hand that won't form for hundreds of thousands or even millions of years yet.It was explained by the processes of heating and cooling that the soil had been through. Dalrymple, “40Ar/36Ar Analyses of Historic Lava Flows,” Earth and Planetary Science Letters,6 (1969): pp. Some rocks have been measured with negative radiometric ages, in some cases in terms of millions of years.Some rocks dated older than the 4.5 billion year evolutionary age for Earth. Isochron dating can also produce negative ages, by producing a negative slope.
Segment from A Science Odyssey: "Origins."Geologists have calculated the age of Earth at 4.6 billion years.Some times radiometric dating produces impossible results.Uranium-Thorium-Lead Method Ages" in Billions of Years Some soil from the Moon has been dated as more than a billion years older than the uniformitarian age for the Moon.Using this technique, called radiometric dating, scientists are able to "see" back in time.To date rocks or other objects, scientists typically use radiometric dating.
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But for humans whose life span rarely reaches more than 100 years, how can we be so sure of that ancient date? Even the Greeks and Romans realized that layers of sediment in rock signified old age.