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Biology, 20.09.2019 16:30 23lopezjimenezl

If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal axis ?


If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred

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If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred...
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