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Now that's some desert varnish


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The best/worst desert vanish that I've ever seen. Scary ?

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Also found a couple lunar suspects. I was shooting for a lunar highlands rocks, but the unfortunate response seems to conclude a Quartz breccia of some sort ? Porous/glassy/translucent veins that shock the rock look strikingly similar to that of the Dhofar 303 clan-but just not quite the same. This game has some bite ?

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If you sell a lunar or martian meteorite on ebay, you sure can make some major cashola !!!!

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Great Find, Munroney. I'm surprised that there hasn't been more responses to this thread. Your rock appears to

have, what there are good reasons to think, are fusion crust and shock-melting. As for the white fragments in this 

breccia, they don't look to me like quartz, but more likely plagioclase. That would be a very good thing; of course.

I agree with Mike, you may have a winner here.

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On April 5, 2017 at 0:21 PM, Mikestang said:

Gotta get that one analyzed, could be...

Could also be quartz.

 

1 hour ago, Shokmelt said:

Great Find, Munroney. I'm surprised that there hasn't been more responses to this thread. Your rock appears to

have, what there are good reasons to think, are fusion crust and shock-melting. As for the white fragments in this 

breccia, they don't look to me like quartz, but more likely plagioclase. That would be a very good thing; of course.

I agree with Mike, you may have a winner here.

This sounds reassuring ?

I'm curious to know what makes you think there is fusion crust. Is it the fact that it has a greenish hue to the exterior compared to that of the interior? Also, why does it look more like plagioclase than Quartz?  I have researched countless hours trying to master the difference between the 2 and have failed to do so haha. 

I should also add another pic that might show a different perspective on things (hopefully for the better). It's the window of the larger specimen and looks surprisingly different. Instead of a white interior, it shows a dull grey with weird striations in the clasts. Im not sure if striations are a good thing or not considering that they are in both feldspar and Quartz, but the color difference has me confused as well. I understand that feldspar can change in color from grey to white depending on how shocked they are, but I am unsure if this contrast can occur within same fall? 

What do you guys think about the larger window? 

 

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28 minutes ago, munroney said:

 

I'm curious to know what makes you think there is fusion crust.

I think he was referring to the first pict, the one that is crazy desert varnish/oxidation.

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50 minutes ago, Mikestang said:

I think he was referring to the first pict, the one that is crazy desert varnish/oxidation.

Yes, Mike, that is what I was referring to. Although it does have the coloration and texture of what is commonly 

seen in desert varnish, it is also flaking off in a way that is typical of weathered fusion crust. That combined 

with the smoothed out surface underneath it (dramatically different than the other surfaces), and the lack of any  

desert varnish on any other areas, inclines me to think that it might very possibly be fusion crust instead. 

It is always important to keep in mind that uncommon meteorites will often have atypical fusion crusts.

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Ah ok, that makes sense. Those are 2 different rocks from different areas. I saw other rocks with the same type of varnish on them, and some even twice as thick. Many of them had traces of Quartz, and for me that was telling. This little guy had a patch on the backside (top-right in photo), and the blocky/jagged shape with a giant hole didn't convince me either (hard to tell from the photos) 

 

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On 4/4/2017 at 2:21 PM, Au Seeker said:

Your photos aren't showing up for me!

Not for me either. Thus the source of my confusion, Thanks for clearing that up, Munroney.

You mention that you find it difficult to discern the difference between feldspar and quartz.

In the case of brecciated material such as this, the fracture tendency is one clue.

Although I'm basing my guess of feldspar on both luster and coloration as well.

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On April 10, 2017 at 8:38 PM, Shokmelt said:

Not for me either. Thus the source of my confusion, Thanks for clearing that up, Munroney..

Although I'm basing my guess of feldspar on both luster and coloration as well.

Ya apparently my tech skills aren't as good as my hunting skills ?

The color definitely has me interested. Quite a strange green hue to it. I think I will throw it in the to-do pile ?

Thanks for the feedback! 

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