Carbon dating exam questions Free camshows without registration

06 Mar

Bowen also demonstrated that if a mineral remained in the melt after it had crystallized, it would react with the remaining melt and produce the next mineral in the sequence shown in Figure 3.6.

For this reason, this arrangement of minerals became known as Bowen's reaction series.

As the crystallization process continues, the composition of the melt (liquid portion of a magma, excluding any solid material continually changes.

This calls the whole radiometric dating scheme into serious question.During the last stage of crystallization, after most of the magma has solidified, the remaining melt will form the minerals quartz, muscovite mica, and potassium feldspar.Although these minerals crystallize in the order shown, this sequence is not a true reaction series.On the upper left branch of this reaction series, olivine, the first mineral to form, Ml] react with the remaining melt to become pyroxene.This reaction will continue until the last mineral in the series, biotite mica, is formed.