Radiometrically dating adjacent rocks
With U halos, colouration initially develops after 100 Ma worth of alpha decay, becomes darker after about 500 Ma worth, and very dark after about 1 billion worth at today’s rates.
Within the biblical time frame, halos provide further evidence for accelerated radiometric decay.
The technical RATE books are not for new creationists or for someone with little background in geophysics or geochronology or nuclear physics.
They are in-depth studies, as one would expect for the results of a research project that challenges radiometric dating.
Radiometric dating is a key area leading to unbelief in the Bible.
There cannot be too many atoms or the alpha damage causes a dark diffuse sphere, making it difficult to recognize the type of halo.
Did the biotite slow helium diffusion out of zircons?
The RATE team subsequently found out, by subcontracting the diffusion experiment to a secular scientist critical of creationists, that the diffusion of helium through biotite is insignificant compared to diffusion out of the zircon crystals.
But there are a few perplexing results for the creationist to think through.
After a preface by John Morris, chapter 1 is an introduction by Larry Vardiman giving the history of the RATE project, the key research results, and the significance of the project.