Re: test questions-old topic

From: Bill Payne (bpayne15@juno.com)
Date: Sun Mar 23 2003 - 21:54:51 EST

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    Your logic is compelling, Dave, but it might help if you would base your
    arguments on field observations of actual outcrops instead of your
    imagination.

    Bill

    On Tue, 18 Mar 2003 19:33:29 -0700 "D. F. Siemens, Jr."
    <dfsiemensjr@juno.com> writes:
    >
    > On Mon, 17 Mar 2003 21:05:50 -0600 Bill Payne <bpayne15@juno.com>
    > writes:
    > in part
    > >
    > > As evidence for rapid deposition, we have bedded marine strata. In
    > > marine environments today, bioturbation will commonly destroy bedding
    > > planes in the top few inches of the bottom sediment in less than a
    week.
    > > Yet we commonly find thin-bedded, fossiliferous units.
    > >
    > I respond as a logician with interests in biology. The problem here
    > is the assumption that _all_ deposits will be disrupted, the fallacy
    > of false generalization. I can immediately think of two kind of
    > deposits that will not be. First, there are anoxic areas where
    > marine life, except for some bacteria, cannot live. Second, there
    > are benthic areas where there is little life, and what there is
    > seems to be on the surface rather than burrowing. I expect that
    > those knowledgeable in the area of marine sedimentation can provide
    > additional examples.
    > Dave

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