[Rockhounds] CAN YOU REALLY FIND MICROMETEORITES IN YOUR GUTTER? WELL…

[THE HAMMER]

Kreigh/All:

Thank you Kreigh.  I was thinking in the lines of if a small (minute) 
fraction of a percentage of the magnet material could have come from 
meteorites.  Just wondering if it could occur in many places worldwide 
but in minute quantities.

On 5/19/19 1:25 PM, Kreigh Tomaszewski wrote:
> The black magnetic flecks in sand are almost always magnetite.
>
> On Sun, May 19, 2019 at 11:03 AM THE HAMMER <hammerron at hotmail.com> wrote:
>
>> When I was a kid, I used to drag a magnet across sand and save the small
>> black bits attracted by the magnet.  I used to call them iron filings,
>> though I do not know if that is the proper term for what I had.  In
>> hindsight, I wonder if any of the material could of been meteoritic?
>>
>> On 5/16/19 5:59 PM, Kreigh Tomaszewski wrote:
>>> I collect meteorites <https://www.youtube.com/watch?v=TuDfZ2Md5x8>, and
>>> have quite a few knocking around my home office. Some are big —
>> fist-sized,
>>> with one I bring with me when I give talks about impacts so people can
>> hold
>>> a piece of an asteroid in their hand — but most are pretty small, like
>> the
>>> size of a finger from the last joint to the tip. A few are pebbles
>>> (generally well-known ones with special scientific interest, making
>> bigger
>>> pieces hard to obtain), and a couple of are sand-grain-sized (one is from
>>> the Moon and the other from Mars).
>>>
>>> While I don't collect them, there is another kind that’s even smaller:
>>> Micrometeorites, usually smaller than a millimeter across, some so teeny
>>> you need a microscope to see them clearly. Bigger ones (say, a tenth of a
>>> millimeter and up) are usually spherical or close to it, because they
>> melt
>>> completely as the ram through our atmosphere at hypersonic speeds, then
>>> solidify after they've slowed down to subsonic speeds (in fact they
>>> probably fall the rest of the way extremely slowly due to their size).
>>>
>>>
>> https://www.syfy.com/syfywire/can-you-really-find-micrometeorites-in-your-gutter-well
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