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What does the Jurassic strata have that the Tertiary strata do not? Neutrinos penetrate the earth so easily that they would affect all strata more or less equally, to the extent that they affect anything at all.If rock type mattered then we would expect a zircon crystal's lead content to vary dramatically within the Cambrian or Cretaceous strata according to their local rock types. Cosmic rays, on the other hand, don't penetrate that far into the earth to begin with, so we can rule them out.

At this point in time they were simply a useful tool for correlating rock formations.By 1830 Lyell's famous textbook, Principles of Geology, came out. Such was the age of the great creationist geologists!The principle of faunal succession in the geologic record was established by direct observation as early as 1799 by William Smith.Noah's flood might just as easily deposit the same crystal in one place as another. Pressure has nothing to do with it, and zircon crystals all have about the same density as their total lead content is small.Just what is it that a Cambrian stratum has which a Cretaceous stratum lacks?

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