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Question

Laboratory measurements yield the following ratios of 40Ar to 40K for the basalt sill, the basalt flow, the 2 ash

layers, and the basalt dike. Using the plot, determine the absolute ages of each, in millions of years (m.y.).

40Ar/40K:  absolute age (m.y.) 

0.0058:____

0.00028 :____

0.0038 :_____

0.0046 :______

0.0052 :_____

Top Answer

Sill: 0.0058:_100 m.y___ Dike: 0.00028:_6m.y__ Ash 1:... View the full answer

Radiometric decay graph .gif

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