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Fwd: Re: Is this your analysis?



>From britt@lpl.arizona.edu Fri Dec  5 14:48:18 1997
>Received: by LPL.Arizona.EDU (4.1/SMI-4.1)
>	id AA24064; Fri, 5 Dec 97 15:47:58 MST
>Date: Fri, 5 Dec 1997 15:47:56 -0700 (MST)
>From: Dan Britt 
>X-Sender: britt@hindmost
>To: "E. Grondine" 
>Subject: Re: Is this your analysis?
>In-Reply-To: <19971205214903.24289.qmail@hotmail.com>
>Message-Id: 
>Mime-Version: 1.0
>Content-Type: TEXT/PLAIN; charset=US-ASCII
>
>
>Dear Ed:
>
>Beats me who wrote that.....the lander is surrounded by ejecta
>from "Big Crater".  Basically almost everything at the site smaller 
than
>about half a meter in diameter is impact ejecta.  JPL has lots of
>people who specialize in getting things wrong....
>
>Dan
>
>
>
>
>On Fri, 5 Dec 1997, E. Grondine wrote:
>
>> Dear Dr. Britt- 
>>       Recently there has been a discussion on a meteorite e-forum 
about 
>> the impact craters near Pathfinder on Mars.  A query to JPL and the 
>> response follow:
>> 
>> >For the last four months I have really enjoyed the postings on 
>> >Pathfinder.  But there is one thing that seems strange:  there has 
>> >been very little mention about the effects observed at the 
Pathfinder 
>> >landing site from the impact that formed the Big Crater.
>> 
>> Their reply:
>> >>Pathfinder did see ejecta material from a nearby crater, which was
>> >>reported just 2 days after it had landed on July 6.  Also, the 
>> >>spacecraft wasn't in a crater, so the odds of finding any effects   
>> >>from an impact drops off the farther away you are from the crater.
>> >>Pathfinder only observed surface rocks, and did not dig down into 
>> >>the ground to find shatter cones, and probably wasn't close enough 
>> >>to the crater anayway.
>> 
>>    This response was met with some incredulity on the list, in as 
much 
>> as some estimates have placed the blast that formed the Big Crater at 
>> around 35 megatons.  A number of people thought that most of the 
rocks 
>> around Pathfinder looked like ejecta.
>>     So, is this your analysis or Dr. McSween's or Dr. Moore's?  If it 
is 
>> not, do you know who is responsible for it?
>> 
>>                                           Best Wishes, 
>>                                               Ed
>>                                          (E.P. Grondine)
>> 
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>


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