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Lecture 9: Oceanic Basalts

Lecture 9: Oceanic Basalts

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15.70<br />

15.60<br />

15.50<br />

15.40<br />

15.30<br />

8.5<br />

Northern Hemisphere Reference Line<br />

8.4<br />

Geochron<br />

8.3<br />

Δ7/4<br />

μ = 8.2<br />

17.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5<br />

206 Pb/<br />

204 Pb<br />

207 Pb/<br />

204 Pb

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