[meteorite-list] Meteor Crater Impactor?

From: Kashuba <mary.kashuba_at_meteoritecentral.com>
Date: Fri, 10 Sep 2010 10:43:03 -0700
Message-ID: <000801cb510f$a1a14090$e4e3c1b0$_at_kashuba@verizon.net>

List,

The little curved structures must be stock ponds - built to capture storm
runoff to water cattle on the range. They are built in streams and have
training dikes.

- John

Ontario, California

-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Yinan Wang
Sent: Friday, September 10, 2010 10:12 AM
To: Meteorite-list
Subject: Re: [meteorite-list] Meteor Crater Impactor?

The mhcmagazine picture is seen from an angle in google earth. When
you look at it directly overhead, it looks like this:

http://maps.google.com/?ie=UTF8&ll=35.02599,-111.022038&spn=0.021402,0.04527
6&t=h&z=15

Looks pretty round to me.

As for the little crater to the SSW, definitely man made, but not sure
for what use.

-Yinan

On Fri, Sep 10, 2010 at 4:59 AM, Meteorites USA <eric at meteoritesusa.com>
wrote:
> Hi Sterling, Thanks for the answer, and links.
>
> Still have a question though. I'm more curious about the angle of descent.
> The paper mentions an angle of 45 degrees.
>
> This seems like a very "safe" guess. Are there any data, or information on
> the angle of descent other than in the paper you provided a link to.
>
> See this crater photo from Google Earth:
> http://www.mhcmagazine.com/images/crater.jpg
>
> The crater is not perfectly round as would be expected from an impactor
> coming in at a sharper angle.In fact the crater is more elliptical in
shape.
> It appears as if the impactor hit at an angle quite a bit shallower than
45
> degrees.
>
> Is it possible the impactor came in at a shallower angle?
>
> Regards,
> Eric
>
>
> On 9/10/2010 1:34 AM, Sterling K. Webb wrote:
>>
>> Eric, List,
>>
>> That is the conclusion of the 2005 paper in "Nature" by
>> Melosh and Collins. Their computer models suggest it
>> fragmented and came in as a swarm of pieces, much
>> slowed by the atmosphere.
>>
>> Here's two popular articles:
>>
>>
http://news.nationalgeographic.com/news/2005/03/0310_050310_meteorcrater.htm
l
>> and
>> http://www.astronomy.com/asy/default.aspx?c=a&id=2965
>>
>> Here's original paper:
>> http://amcg.ese.ic.ac.uk/~gsc/publications/articles/download/article7.pdf
>>
>> Well, one page from Nature, Vol. 434, 10 March, 2005.
>>
>>
>>
>> Sterling K. Webb
>>
>>
----------------------------------------------------------------------------
-----
>> ----- Original Message ----- From: "Meteorites USA"
>> <eric at meteoritesusa.com>
>> To: "Meteorite-list" <meteorite-list at meteoritecentral.com>
>> Sent: Thursday, September 09, 2010 10:44 AM
>> Subject: [meteorite-list] Meteor Crater Impactor?
>>
>>
>>> Hi List,
>>>
>>> Can someone tell me the proposed/accepted angle of descent of the
>>> asteroid which formed Meteor Crater in AZ?
>>>
>>> Wikipedia has the impactor at 50 meters across, and velocity at 12.8
>>> km/s. Is this accurate?
>>>
>>> Eric
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>>
>>
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Received on Fri 10 Sep 2010 01:43:03 PM PDT