Peterson is
responding to my response to him, in the
November 1999
Feedback (see the third letter from the top).
Spinning Sun
To begin with, the angular momentum of the sun is quite
independent of the Big Bang (which I presume you mean to
refer to as "Big Dud"). While the angular momentum
of the sun is not a completely solved problem, it is hardly
the issue that you make it out to be. Models of stellar
formation show a great deal of mass loss (which expels
momentum as well), and include magnetic braking. Spectacular
images from the Hubble
Space Telescope confirm these models, even to the
detailed shape of the equatorial disk of the protostar
system. These details of stellar formation easily handle
the apparent, but not real anomaly of angular momentum
distribution in the solar system.
The Mollusk Shell
What's wrong with a living mollusk being 23.00 years old? I
presume this is a typo, and you meant something else. In
any case, it does not matter, because it is well known that
you cannot carbon date anything that is still alive. So the
result is meaningless, and wrong.
The Dacite Dome of
Mt. St. Helens
You say that carbon-14 dating of the dome reveals an age of
45 million years. This is an extremely weird statement. For
one thing, carbon dating only works for organic material,
never for rocks, so whoever did that does not appear to
know what they were doing. For another thing, the short
half-life of carbon 14 limits radiocarbon dating to no more
than about 50,000 years. A "date" of 45 million years
simply means that there was not enough carbon-14 in the
sample to measure, which is not surprising, since a dacite
rock shouldn't have any carbon-14 in it anyway (and can't
be dated by that method, since it's inorganic). As for the
K-Ar "date", 45,000 years is clearly too small a number to
trust for that method. Therefore, the correct
interpretation of such a "date" is not that the sample is
45,000 years old, but that the sample is "too young to
date". In both cases that you cite the work was done
improperly, and interpreted unreasonably, considering the
physical limitations known for both methods. Therefore, in
both cases, you are wrong.
Leap Seconds
The leap seconds added to the atomic time scale are not a
direct result of the slowing of the Earth's spin. Rather,
they are an artifact of the fact that one second of atomic
time is not the same as one second of universal time. So,
to keep the two time scales in sync, so that they will
always read a time that is within one second of each other,
leap seconds are occasionally added to the atomic time
scale (always at intervals of 6 or 12 months, never 10
months). The actual current rate of spin down for the Earth
is approximately 1.5 milliseconds per day per century
(i.e., every 100 years, the day is 0.0015 seconds longer,
on average). If we assume that is a constant rate, then
900,000,000 years ago, the length of day should have been
about 20 hours and 15 minutes (13,500 seconds shorter).
Observations of tidal rhythmites suggest a length of day
rather shorter, about 18.9 hours
["
Neoproterozoic
Earth-Moon Dynamics: Rework of the 900 Ma Big Cottonwood
Canyon Tidal Laminae"; C.P. Sonett & M.A. Chan;
Geophysical Research Letters, 25(4): 539-542, February 15,
1998
]. This is consistent with the understanding
that the rate of spindown for the Earth should not be
constant, but should have been larger in the past. The
actual rate of spindown is consistent with an evolutionary
age for the Earth, and your explanation and interpretation
of leap-seconds are both wrong.
Reversals of the Earth's Magnetic Field
The observational evidence consists of striping along the
ocean floor, as well as deep cores drilled from under the
ocean, and from volcanic rocks in continental volcanic
fields. In all three cases, the same pattern of polarity
reversals holds, and in all three cases, consistent
radiometric dates show the same time sequence. The ability
of the cold rocks to "store a magnetic field better" is not
a relevant issue. Most magnetizable rocks that are exposed
to an ambient magnetic field, while warmer than their Curie
temperature, will retain that field imprinted in their own
magnetic structure, when their temperature descends below
the Curie point. The few exceptions that can self-reverse
are well known, and accounted for in studies of
paleomagnetism. The evidence therefore strongly suggests
that, in fact, the Earth's magnetic field has reversed
polarity on numerous occasions in the past. You say that
there is no "legitimate hypothesis" for how the
Earth's magnetic field might have performed the
"incredible feat" of reversing. Yet, it was shown 14
years ago that stochastic processes in a simple dynamo
could cause a spontaneous polarity reversal ["The
stochastic excitation of reversals in simple dynamos";
D. Crossley, O. Jensen & J. Jacobs; Physics of the
Earth and Planetary Interiors, 42: 143-153, 1986].
By 1995, Glatzmaier & Roberts had shown that a
physically reasonable geodynamo would spontaneously reverse
polarity, for essentially the same reasons that Crossley et
al. had uncovered in 1986 ["A 3-Dimensional
Self-Consistent Computer Simulation of a Geomagnetic Field
Reversal"; G.A. Glatzmaier & P.H. Roberts; Nature,
377(6546): 203-209 (21 September 1995); "A 3-Dimensional
Convective Dynamo Solution with Rotating and Finitely
Conducting Inner-Core and Mantle"; G.A. Glatzmaier
& P.H. Roberts; Physics of the Earth and Planetary
Interiors 91(1-3): 63-75 (September 1995); "An Anelastic
Evolutionary Geodynamo Simulation Driven by Compositional
and Thermal Convection"; G.A. Glatzmaier & P.H.
Roberts; Physica D 97(1-3): 81-94 (October 1,
1996)]. These papers clearly outline, and model, the
reversal process, and reveal that the time scale for such a
reversal is consistent with the timescale observed in the
geological evidence.
Gentry's Halos
Gentry's Polonium halos are not "parentless", they only
appear to be so when carelessly investigated. All of
Gentry's halos are from Polonium isotopes 218, 214 and 210.
Despite the fact that there are many other isotopes of
Polonium, these are the only ones he has found. All three
of them appear in the Uranium 238 decay chain. All of the
locations where Gentry found halos are in proximity of
uranium 238 sources. Significantly, the halos from Polonium
210 and Radon 222 (the parent for Polonium 218) are
indistinguishable to Gentry. In every case, his halos are
entirely consistent with the products of Uranium decay, and
an evolutionary time scale.