[meteorite-list] Fireballs From The Sky: Bombarded

From: Meteorites USA <eric_at_meteoritecentral.com>
Date: Mon, 30 Mar 2009 10:32:33 -0700
Message-ID: <49D10231.2060200_at_meteoritesusa.com>

Doesn't one large asteroid (miles across) have multiple types of
meteoritic material? Iron at the core, silicate and iron mix surrounding
that, chondritic material, and achondritic nearer the surface of an
asteroid. Or am I watching too many meteorite videos? ;)

If accretion is correct and iron migrates to the center of a large body,
then it would make sense that lighter less dense materials would
surround that. When two asteroids impact wouldn't they cause all these
types to intermingle and spray out in all directions? In addition they
create impact melts and breccias as well. What about carbonaceuous
chondrites?

If two large asteroids crashed into one another some million years or so
ago wouldn't there be huge numbers of all different types of material
thrown out into all directions? Couldn't there be multiple falls
consisting of different types of meteorites but originating from the
same event in space? I realize I may be missing some important facts
here but if large asteroids do in fact consist of all meteoritic
composition types, couldn't you argue that some or all of these falls
may come from one event? I know this question might have a few people
yelling at me that I don't know what I'm talking about. You're right!
That's why I'm asking... ;)

Regards,
Eric







rocks at projectargus.com wrote:
> It looks like we're on track to have one meteorite per month:
>
> Oct. Sudan (2008 TC3)
> Nov. Buzzard Coulee
> Dec. Tamdakht
> Jan. Denmark
> Feb. West
> Mar. Augusta, GA?
>
> One per month is a great fall rate, and I hope they keep coming!
> Still, I don't think this activity is high enough to support your
> theory of a debris cloud. Notice that the 5 most recent confirmed
> falls have been 5 different types: Sudan is ureilite, Buzzard Coulee
> is H4, Tamdakht is H5, Denmark is a carbonaceous chondrite, and West
> is L6. How would your theory support such a variety of incoming
> material?
>
> My theory: more fireballs and meteorites are getting reported, but
> that doesn't necessarily mean more fireballs and meteorites are
> occuring. I'd like to make 4 points:
>
> 1. Each year, the Earth's population increases.
> 2. More people are learning about what meteorites are, thanks to
> mainstream TV shows on the History Channel, etc.
> 3. More people are learning that meteorites are worth big $$$, thanks
> to news coverage.
> 4. Each year, more and more people are getting connected to the
> internet.
>
> Put all of this together, and you have: more people + more awareness +
> more motivation + a global way to get news out. Personally, I think
> this explains the higher number of fireballs and witnessed falls
> getting reported each year.
>
> I'd like to know what others think about this.
>
> I'd also say that over the past year or two, the meteorite collecting
> community has become much more focused on witnessed falls and
> hammers. This means we're not letting any suspected falls get
> overlooked. If this Georgia fireball had happened a few years ago,
> would it have gotten this much attention on the list?
>
> All the best-
> --Noah
>
>
> ----- Original Message ----- From: "Meteorites USA"
> <eric at meteoritesusa.com>
> To: <meteorite-list at meteoritecentral.com>
> Sent: Monday, March 30, 2009 11:22 AM
> Subject: [meteorite-list] Fireballs From The Sky: Bombarded
>
>
>> Over the past few months or so I've been tracking many fireball
>> sightings and suspected new falls all over the world. Recently we've
>> had no fewer than 4 right here in the United States. Not to mention
>> the Denmark fall, Tamdaught, West, Westchester, Augusta, Sacramento,
>> and the Merced Fireball. And the largest meteorite fall in Canadian
>> history Buzzard Coulee! I'm sure I'm forgetting some.
>>
>> Now another big event near MD, VA area:
>> http://www.wtop.com/?nid=600&sid=1636442
>> <http://www.wtop.com/?nid=600&sid=1636442>
>>
>> I asked this a week or so ago, but got very little response other
>> than "yeah sure".
>>
>> Isn't this abnormally high meteor activity? Is our planet traveling
>> through a large field of asteroidal space debris right now? How can
>> some many fireballs and meteorite falls happen in such a short period
>> of time unless this were the case?
>>
>> Regards,
>> Eric Wichman
>> Meteorites USA
>>
>>
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-- 
Regards,
Eric Wichman
Meteorites USA
http://www.meteoritesusa.com
904-236-5394

Received on Mon 30 Mar 2009 01:32:33 PM PDT