[Da_Shrimp]

but how do evolutionists explain apparent young-Earth observations ranging from the excessive presence of helium in zircon contained in deep Precambrian granitic rock

Ross Humphreys work? Plenty of explanations by 'evolutionists' out there. Here's a good source. There are also plenty of counters out there to the decay of the earth's magnetic field and the cosmic ray dust on the moon argument.

Indeed, the second of these (the moon dust) is specifically mentioned on AnswersinGenesis.org as an argument that Creationists should NOT use! See Arguments we think creationists should NOT use.

[Titus Quinctius Cincinnatus]

Good explanations for a variety of things from creationists, as well - http://www.trueorigin.org/True Origin archive

[Titus Quinctius Cincinnatus]

Good explanations for a variety of things from creationists, as well - http://www.trueorigin.org/True Origin archive