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Qwickdraw
Carpal Tunnel
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Reged: 03/03/12

Loc: Ann Arbor, MI
Re: Mysterious Appearing Mars Rock new [Re: Andy Taylor]
      #6344998 - 01/30/14 11:58 AM

Quote:

I think that it has been thrown up by one of these...

Martian dust devils




oops Andy, I didn't see your post until after I made my prior post. I agree 100%.

Great minds think alike.
The problem is so do irrational minds.


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Andy Taylor
Twisted, but in a Good Way
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Reged: 09/24/08

Loc: Epsom - UK
Re: Mysterious Appearing Mars Rock new [Re: Qwickdraw]
      #6345144 - 01/30/14 01:19 PM

Quote:

Ok, my theory if found not kicked up by a wheel is that it was tossed there from one of the many dust devils that are common on Mars.




See my link on the previous page - most likely I think...


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Glassthrower
Vendor - Galactic Stone & Ironworks
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Reged: 04/07/05

Loc: Oort Cloud 9
Re: Mysterious Appearing Mars Rock new [Re: Andy Taylor]
      #6345267 - 01/30/14 02:12 PM

A meteorite will not always leave a crater or visible impact mark. Depending on the speed, angle of entry, size, shape, and composition of the meteor, the surviving fragment that impacts the surface of the planet may simply fall at terminal velocity and "gently" hit the ground. That is why the majority of small meteorites found on Earth are not associated with a crater or an impact pit.

However, Mars has a much thinner atmosphere, so the incoming meteor would not shed as much cosmic velocity during atmospheric entry. I would think that meteorites on Mars would retain more of their speed and transfer that velocity in the form of energy released during impact with the surface - hence, more craters, bigger craters, and more ejecta.

Given the lack of any visible ejecta, it is highly unlikely to be a meteorite. But, what else is it likely to be?

Best regards,

MikeG


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dyslexic nam
Carpal Tunnel
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Reged: 01/28/08

Loc: PEI, Canada
Re: Mysterious Appearing Mars Rock new [Re: Glassthrower]
      #6345330 - 01/30/14 02:44 PM

Martian flowers sure are ugly.

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Les Aperture
member


Reged: 04/11/13

Loc: Central Illinois
Re: Mysterious Appearing Mars Rock new [Re: dyslexic nam]
      #6345584 - 01/30/14 04:56 PM

waiting for it to sublimate...

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rdandrea
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Reged: 06/13/10

Loc: Colorado, USA DM59ra
Re: Mysterious Appearing Mars Rock new [Re: Glassthrower]
      #6345587 - 01/30/14 04:56 PM

Quote:

Given the lack of any visible ejecta, it is highly unlikely to be a meteorite. But, what else is it likely to be?




Ejecta from a distant meteorite impact. That's one of the working hypotheses. Not my favorite (I like the "rock dislodged by wheel" hypothesis), but still in play. The composition of the rock doesn't say "meteorite" to me.


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Rick Woods
Postmaster
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Reged: 01/27/05

Loc: Inner Solar System
Re: Mysterious Appearing Mars Rock new [Re: rdandrea]
      #6345837 - 01/30/14 07:14 PM

Martian cow pie.

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Glassthrower
Vendor - Galactic Stone & Ironworks
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Reged: 04/07/05

Loc: Oort Cloud 9
Re: Mysterious Appearing Mars Rock [Re: Rick Woods]
      #6345928 - 01/30/14 08:10 PM

Quote:


Ejecta from a distant meteorite impact. That's one of the working hypotheses. Not my favorite (I like the "rock dislodged by wheel" hypothesis), but still in play. The composition of the rock doesn't say "meteorite" to me.





I had not considered ejecta from a distant impact.

Agreed, it does not resemble a meteorite....but, some aubrites and enstatite meteorites have a white or pale matrix. Absent any fusion crust, they can look very odd. Look at pieces of the Norton County aubrite. Some pieces are pure white.

Ejecta could also be native Martian rock. Ejecta is a mix of target rock from the impact area and remnants of the impacting meteorite. We could be seeing a piece of Martian rock displaced by an unseen meteorite impact.

It is still unlikely, but given the lack of working theories, this is as good as some.

Best regards,

MikeG


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llanitedave
Humble Megalomaniac
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Reged: 09/26/05

Loc: Amargosa Valley, NV, USA
Re: Mysterious Appearing Mars Rock new [Re: Glassthrower]
      #6346450 - 01/31/14 01:45 AM

I'm kind of leaning towards the ejecta from a somewhat distant impact myself. Not too distant, or it would have left a substantial crater. Not too close, or the composition wouldn't be so unusual for the immediate vicinity.

I'd really be scanning the MRO output to see if there are any new craters a few tens of kilometers away from Endeavor crater.


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Mister T
Pooh-Bah


Reged: 02/01/08

Loc: Upstate NY
Re: Mysterious Appearing Mars Rock new [Re: llanitedave]
      #6348106 - 01/31/14 09:30 PM

It's a marshroom

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Rick Woods
Postmaster
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Reged: 01/27/05

Loc: Inner Solar System
Re: Mysterious Appearing Mars Rock new [Re: Mister T]
      #6348346 - 02/01/14 12:40 AM

Quote:

It's a marshroom




Ahh, jeez, you're terrible!


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Mister T
Pooh-Bah


Reged: 02/01/08

Loc: Upstate NY
Re: Mysterious Appearing Mars Rock new [Re: Rick Woods]
      #6350130 - 02/01/14 09:59 PM

Thank You!

I'm here til Thursday

Try the veal...


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herrointment
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Reged: 03/12/11

Loc: North of Hwy. 64
Re: Mysterious Appearing Mars Rock new [Re: Mister T]
      #6350272 - 02/01/14 11:31 PM

It's veally good!!!

Edited by herrointment (02/01/14 11:32 PM)


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maugi88
Carpal Tunnel


Reged: 08/25/13

Loc: SE MN
Re: Mysterious Appearing Mars Rock new [Re: herrointment]
      #6350827 - 02/02/14 10:02 AM

Oh boy!

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Khyron
member


Reged: 12/28/13

Loc: East Central Ohio, USA
Re: Mysterious Appearing Mars Rock new [Re: maugi88]
      #6351080 - 02/02/14 12:05 PM

NASA is being sued over this...

Quote:

Some red tape from the red planet — with NASA now facing a lawsuit over an alleged Martian rock that looks sort of like a jelly doughnut.

Earlier this week in a California court, astrobiologist Rhawn Joseph filed suit in an attempt to force the American space agency to examine a rock the Opportunity rover first photographed on Mars Jan. 8. (Via U.S. District Court)

His claim? It's alive.




http://www.ajc.com/news/news/nasa-sued-over-jelly-doughnut-shaped-martian-roc...

Edited by Khyron (02/02/14 12:05 PM)


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maugi88
Carpal Tunnel


Reged: 08/25/13

Loc: SE MN
Re: Mysterious Appearing Mars Rock new [Re: Khyron]
      #6359771 - 02/06/14 01:45 PM

Did you see the article about the brand new impact site on mars? Maybe Dave was right and this is an impact ejecta. The headline states that in the past three years, so who knows.http://news.yahoo.com/pow-fresh-crater-mars-spotted-nasa-spacecraft-photo-114248945.html

Edited by maugi88 (02/06/14 01:45 PM)


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PeterR280
Pooh-Bah
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Reged: 05/27/13

Re: Mysterious Appearing Mars Rock new [Re: maugi88]
      #6360071 - 02/06/14 04:08 PM

Was the recently discovered Mars impact crater near the Rover?

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maugi88
Carpal Tunnel


Reged: 08/25/13

Loc: SE MN
Re: Mysterious Appearing Mars Rock new [Re: PeterR280]
      #6360206 - 02/06/14 05:18 PM

I don't know. The following is a excerpt from the article: The asteroid or comet that created the crater — which sits at 3.7 degrees north latitude and 53.4 degrees east longitude on Mars — ejected material as far as 9.3 miles (15 kilometers) away from the impact site, officials added

Where is Opportunity? It also stated that the impact was before May of 2012 so when was Opportunity parked? Wait, I guess it couldn't have been it. Opportunity was surely moving around in 2013. Sorry folks, I should have read the article before posting. Oops

I was so excited when I saw that headline I just posted it right away. I do apologize to all.

Edited by maugi88 (02/06/14 05:19 PM)


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dyslexic nam
Carpal Tunnel
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Reged: 01/28/08

Loc: PEI, Canada
Re: Mysterious Appearing Mars Rock [Re: maugi88]
      #6360217 - 02/06/14 05:22 PM

No worries. It's not like NASA has said anything lately, so we might as well speculate...

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Rick Woods
Postmaster
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Reged: 01/27/05

Loc: Inner Solar System
Re: Mysterious Appearing Mars Rock [Re: maugi88]
      #6360294 - 02/06/14 05:59 PM

Quote:

I was so excited when I saw that headline I just posted it right away. I do apologize to all.




Yeah, you're the only person that's ever done that here!


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