Changes

#:"Radioactive inclusions in rock often cause concentric spheres of discoloration due to the damage caused by alpha particles as they are emitted by the radioactive substance. Pleochroic halos are the scars of radioactive decay, particularly alpha decay. These scars appear as spheres (rings when views in cross-section) in the rock surrounding a decaying radioactive atom. The size of the halo is a signature of the energy of the emission and therefore the element and isotope involved. Creationists use these halos in several ways to suggest problems with the standard uniformitarian model."<ref name="cwye" />

#:"Radioactive inclusions in rock often cause concentric spheres of discoloration due to the damage caused by alpha particles as they are emitted by the radioactive substance. Pleochroic halos are the scars of radioactive decay, particularly alpha decay. These scars appear as spheres (rings when views in cross-section) in the rock surrounding a decaying radioactive atom. The size of the halo is a signature of the energy of the emission and therefore the element and isotope involved. Creationists use these halos in several ways to suggest problems with the standard uniformitarian model."<ref name="cwye" />

# '''Helium diffusion'''

# '''Helium diffusion'''

#:"One type of nuclear decay is the emission of Helium nuclei known as an alpha emission. Elements like uranium and thorium produce helium in zircons as a by-product of their radioactivity. This helium seeps out of (sic) zircons quickly over a wide range of temperatures. If the zircons really are about 1.5 billion years old (the age which conventional dating gives assuming a constant decay rate), almost all of the helium should have dissipated from the zircons long ago. But there is a significant amount of helium still inside the zircons, showing their ages to be 6000 +/- 2000 years. Accelerated decay must have produced a billion years worth of helium in that short amount of time."<ref name="cwye" />

#:"One type of nuclear decay is the emission of Helium nuclei known as an alpha emission. Elements like uranium and thorium produce helium in [[zircon]]s as a by-product of their radioactivity. This helium seeps out of (sic) zircons quickly over a wide range of temperatures. If the zircons really are about 1.5 billion years old (the age which conventional dating gives assuming a constant decay rate), almost all of the helium should have dissipated from the zircons long ago. But there is a significant amount of helium still inside the zircons, showing their ages to be 6000 +/- 2000 years. Accelerated decay must have produced a billion years worth of helium in that short amount of time."<ref name="cwye" />

#:"Uranium and thorium generate helium atoms as they decay to lead. A study published in the ''Journal of Geophysical Research'' showed that such helium produced in zircon crystals in deep, hot Precambrian granitic rock has not had time to escape.25 Though the rocks contain ''1.5 billion years'' worth of nuclear decay products, newly-measured rates of helium loss from zircon show that the helium has been leaking for only '''6,000''' (± 2000) '''years'''.26 This is not only evidence for the youth of the earth, but also for episodes of greatly accelerated decay rates of long half-life nuclei within thousands of years ago, compressing radioisotope timescales enormously."<ref name="icrye" />

#:"Uranium and thorium generate helium atoms as they decay to lead. A study published in the ''Journal of Geophysical Research'' showed that such helium produced in zircon crystals in deep, hot Precambrian granitic rock has not had time to escape.25 Though the rocks contain ''1.5 billion years'' worth of nuclear decay products, newly-measured rates of helium loss from zircon show that the helium has been leaking for only '''6,000''' (± 2000) '''years'''.26 This is not only evidence for the youth of the earth, but also for episodes of greatly accelerated decay rates of long half-life nuclei within thousands of years ago, compressing radioisotope timescales enormously."<ref name="icrye" />

#:"In 2000 the [[RATE]] project began experiments to measure the diffusion rates of helium in zircon and biotite specifically from the Jemez Granodiorite. The data...are consistent with data for a mica related to biotite, with recently reported data for zircon and with a reasonable interpretation of the earlier zircon data. ...[These] data limit the age of these rocks to between 4,000 and 14,000 years."<ref>http://www.icr.org/pdf/research/Helium_ICC_7-22-03.pdf</ref>

#:"In 2000 the [[RATE]] project began experiments to measure the diffusion rates of helium in zircon and biotite specifically from the Jemez Granodiorite. The data...are consistent with data for a mica related to biotite, with recently reported data for zircon and with a reasonable interpretation of the earlier zircon data. ...[These] data limit the age of these rocks to between 4,000 and 14,000 years."<ref>http://www.icr.org/pdf/research/Helium_ICC_7-22-03.pdf</ref>