Geologic Time Table
17-Aug-94 15:14:40
Sb: #141965-Geologic Time Table
Fm: Jim Ferguson 75766,3357
To: Kamron Kirkconnell 73740,2246
"The average particles in a given layer are consistent within the layer. Each
layer is world wide."
Neither of these 2 statements is true. There are many layers of water formed
sandstones and shales that have very different particle sizes. The differences
are accounted for by differential rates of erosion due to flooding and periods
of drought over thousands of centuries. The layers of stone are not present
worldwide. If they were then here in Indiana we would have all the layers of
rock that are found at the Grand Canyon and we don't. We do have some rock
layers that were formed during the same time periods as some of the rocks of
the Grand Canyon but they are not the same kinds of rocks.
Your use of the terms Pre-Cambrian, Cambrian, Ordovician, Silurian for the
layers of rocks is unusual. Those terms are time periods. They do not connote
or denote anything about the types of rocks formed during that period. They do
convey information about the types of fossils, and the geological time-frame
during which those rocks were formed. It is quite possible to have a
Pennsylvanian coal in one place, a Pennsylvanian sandstone in another place,
and a Pennsylvanian limestone somewhere else.
"These facts prove the material arrived from outer space (ie from the Sun)."
I won't argue the merits or demerits of your suggestion, but your argument has
problems because your premises (the statements you call facts) are not true.
Therefore any conclusion you would draw from them would only be true by chance
not by proof.
_The Grand Canyon_ by Jeremy Schmidt (ISBN 0-395-59932-6) is widely available
in the travel section of most bookstores and provides a good overview of the
geology and ecology of GCNP. Reading it might clear up some of your questions.
jf