"But maybe it would be easier to explain away the leaves than to attempt to
reinvestigate the data on the cycles."
As a matter of fact, yah it would be, considering the gargantuan amount of
data that links these rythmites to the lunar tidal cycles. Perhaps the
"leaves" are mineral formations similar to those found in moss agates.
They could have formed after the rythmites petrified.
Kevin L. O'Brien
"Good God, consider yourselves fortunate that you have John Adams to abuse,
for no sane man would tolerate it!" William Daniels, _1776_