Figure 7. Idealized schematic of 238U,
218Po, 214Po, and 210Po halos.
Figure 8.238U halo in fluorite. (× 535)
Figure 9.218Po halo in fluorite. (× 535)
Figure 10.214Po halos in mica. (× 250)
Figure 11.218Po halos in mica. (× 250)
Figure 12. The Spectacle Halo,
an overlapping series of 210Po halos discovered in a piece of
biotite from the Silver Crater mine, Faraday Township, Ontario.
Reproduced from ref. (3) by permission of Nature. (× 560)
Get the entire printed version of our book for $18 + S/H.