Dear List,
Another curiosity that I struggled with intellectually while out there on the lakes was this controversy over the find ratio of lunars to martians (It currently stands close to even, I beleive). It's easy for me to holistically contemplate that, all other things being equal, it should
Mark:
Hello, you pose an interesting observation and
question. The first thing which comes to mind is thatpredictions
based on statistics are more likely to fall within predicted ranges when
relatively high numbers are involved. I don't recall off-hand how many of
each (lunar and Martian)
Q: When were most space floaters from Mars and the Moon created?
A: A couple billions of years ago when most of the planetary bombardments
were occurring.
Q: How long have these planetary meteorites been on earth?
A: Probably all less than 25,000 years. So we know the rate of finds from
In a message dated 12/20/2003 8:24:13 AM US Mountain Standard Time,
[EMAIL PROTECTED] writes:
Q: When were most space floaters from Mars and the Moon created?
A: A couple billions of years ago when most of the planetary bombardments
were occurring.
Actually they are much, much
Norbert,
Thanx for correction as always.
This does answer reinforce the Mars material late arrival notion? Still too
complicated is a start...
Time, time, time...
JD
Hi Mark, John, and List,
Since Eric already addressed an error in the first answer regarding
the absolute ages of
Hi Mark, John, and List,
Since Eric already addressed an error in the first answer regarding
the absolute ages of Martian, and lunar meteorites, let me address an
error in the second answer:
Q: How long have these planetary meteorites been on earth?
A: Probably all less than 25,000 years. So
Thanx Eric,
If our max 19 million year CRE ages are correct relative to the carbon
dating, then materials from the ancient impacts are not around, or at least
in space or evident on Earth. Maybe on other planets...maybe.
Q: Does this imply that the Asteroid Belt is out of bounds for this
Hi,
Just as it's hard to get to the Moon (from Earth, that is, I haven't made it
yet), it's even harder to get TO the Earth FROM the Moon.
Yeah, I know, it flies in the face of the obvious (Earth LOOKS flat)! There's the
Moon just hanging around up there in the heavenly neighborhood,
Hi,
Easiest expalnation is that the moonrocks we do find on Earth
have gotten here in a short timeframe. Probably zinged around
in the Earth-Moon system for a while and then had the bad luck
to smack us.
And a short cosmic ray exposure age is a long time, at
least for us humans. Tektites
Another curiosity that I struggled with intellectually while out there on the lakes
was this controversy over the find ratio of lunars to martians (It currently stands
close to even, I beleive). It's easy for me to holistically contemplate that, all
other things being equal, it should be
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