[meteorite-list] Tata-Foumzgit Martian Fall. (Why no lunar falls? and freshest lunar?)

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Sat, 14 Jan 2012 13:10:57 -0500
Message-ID: <CAKBPJW9-11YvskE=YK7a1xFKs+2V6jSrNPSBD8Kpnwci8OP4RQ_at_mail.gmail.com>

Hi Doug, Martin, and List,

I know nothing of the mathematics and modeling of meteoroid impact
rates, but it strikes me as anomalous (statistically) that we don't
have any lunar falls yet. It seems likely that there have been lunar
falls, but they were never recovered or recognized.

I agree with Martin when he says we should savor the energy that this
new fall brings, because it shouldn't happen again (statistically) for
another ~50 years. It felt very special to hold a sample from this
fall only months after it fell to Earth. To hold the freshest Martian
is far more exciting than to hold the freshest ordinary chondrite.
And I would think many collectors would agree, that to experience that
same thrill with a fresh lunar would be a great sequel to this Martian
event. :)

On a related note, a question - what is the freshest lunar on record?
In terms of terrestrial age, what lunaite has the most recent fall?

Best regards,

MikeG

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On 1/14/12, Martin Altmann <altmann at meteorite-martin.de> wrote:
> Yep,
>
> also the modelling by Gladman, that 5% of the ejecta from Mars will fall on
> Earth, but that 50% of the rocks released from Earth/Moon will be collected
> by the Earth-Moon-system again,
> tells something about probabilities, but not about the absolute frequency,
> how often an impact on Moon and Mars releases rocks into space.
>
> Also the notion, that a rock blasted off from Moon will jump more or less
> directly on Earth is somewhat incorrect. We have exposure ages for the
> lunars, partially, where we weren't sitting in the trees yet - up to more
> than a dozen millions of years, where that stuff was orbiting around the
> sun.
>
> But, folks.
>
> Chassigny, that was Waterloo, Congress of Vienna and Beethoven still
> composing symphonies - Shergotty, there you had just finished the Civil War
> and Lewis published Alice in Wonderland - Nakhla, the Mexican Revolution,
> Agadir-crisis, and the Titanic is launched - Zagami = the Cuban Missiles
> Crises, Algerian independence war,
> Aaaaand the Ford Edsel was skipped!
>
> And you, you know now for 3 weeks from the new Martian fall; after such an
> eternity
> - though now you're yearning for a lunar fall?
>
> Huh. Enjoy rather the momentousness of that event, grab rather the best
> individuals you can, before you have to wait again until 2062, when you'll
> have the next opportunity to do so!
>
> :-)
> Martin
>
>
>
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Received on Sat 14 Jan 2012 01:10:57 PM PST