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Fwd: Re: Is this your analysis?
- To: meteorite-list@meteoritecentral.com
- Subject: Fwd: Re: Is this your analysis?
- From: "E. Grondine" <epgrondine@hotmail.com>
- Date: Fri, 05 Dec 1997 09:28:52 PST
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>From robh@geo.princeton.edu Wed Dec 3 19:11:21 1997
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>Date: Wed, 03 Dec 1997 21:31:15 -0500
>To: "E. Grondine"
>From: Robert Hargraves
>Subject: Re: Is this your analysis?
>In-Reply-To: <19971204011256.26129.qmail@hotmail.com>
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>No, this is/was not my analysis. I gather that people feel (from Viking
>orbiter imagery and the apparent location of Pathfinder) that there is
a
>small crater nearby, and various estimates as to how much "ejecta"
there
>might be in the vicinity, have been voiced. Some even that most of the
>boulders/blocks might be ejecta. But for more detail, I suggest you ask
Dan
>Britt : britt@LPL.Arizona.EDU
>
>At 05:11 PM 12/3/97 PST, you wrote:
>>Dear Dr. HargrAves -
>> 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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