A researcher analyzes obsidian (volcanic glass) arrowhead and finds that the ratio of 40 Ar/ 40 K
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A researcher analyzes obsidian (volcanic glass) arrowhead and finds that the ratio of 40 Ar/ 40 K is 1/1. The researcher declares that the arrowhead is 1.3 billion years old and says that our entire geologic timescale is invalid. What error has the researcher made?
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