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pseudo achondrite?

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#1 unfindable

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Posted 06 March 2024 - 08:12 AM

When i am looking for rocks and possible meteorites, i always check which kind of rocks can be found in the area and then i notice the out of place rocks and give them a second look. I found this rock fragment which was defently not like the rocks in the area and it has green, white and black crystals. But i doesn't look like granite. Is this a pseudo achondrite  or the real thing.

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#2 unfindable

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Posted 06 March 2024 - 09:39 AM

I have studied the rock very carefully under the light microscope and it is an amazing complex rock and it is not a granite or gabbro after all. And the white area on the photo does look like this one: http://www.meteorite...ed_ERG-A001.HTM.

 

There is one problem though how did it came there, bause if it was deposited by glacial movement it would have been more rounded i thought.

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Edited by unfindable, 06 March 2024 - 03:48 PM.

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#3 lee14

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Posted 06 March 2024 - 10:17 AM

Often, rocks that don't match those more commonly found in an area, were transported there by glaciers. You're far enough north for this to be a possibility, right?

 

Lee



#4 unfindable

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Posted 06 March 2024 - 03:52 PM

Often, rocks that don't match those more commonly found in an area, were transported there by glaciers. You're far enough north for this to be a possibility, right?

 

Lee

Hi Lee, do the rocks transported by glacier not tend to be rounder? my rock has very sharp edges and seems extremely fresh no algea or criters on it.



#5 lee14

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Posted 06 March 2024 - 08:16 PM

Hi Lee, do the rocks transported by glacier not tend to be rounder? my rock has very sharp edges and seems extremely fresh no algea or criters on it.

Not necessarily. They spend most of the time trapped and immobilized in the ice, not tumbling around as they would in a river. When the ice melts, they're released.

 

Lee


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#6 Sincos

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Posted 06 March 2024 - 08:42 PM

Not necessarily. They spend most of the time trapped and immobilized in the ice, not tumbling around as they would in a river. When the ice melts, they're released.

 

Lee

Erratics are what they are called , billions of small handheld ones wherever glaciers yielded them . Then you also get bigger erratics the size of buildings.  Spent a decade living about a 45 minute drive from these beauties……

 

https://alberta.pres...atic-big-rock/ 

 

sorry original posted link was a blank page. 


Edited by Sincos, 06 March 2024 - 10:06 PM.

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#7 Tom Barnacle

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Posted 07 March 2024 - 06:43 AM

When i am looking for rocks and possible meteorites, i always check which kind of rocks can be found in the area and then i notice the out of place rocks and give them a second look. I found this rock fragment which was defently not like the rocks in the area and it has green, white and black crystals. But i doesn't look like granite. Is this a pseudo achondrite  or the real thing.

Just curious - why not a terrestrial Gabbro?  I think I can see plagioclase and pyroxene - also the angular shape and lack of any fusion crust do not indicate any aerodynamic heating/ablation - but of course gabbroic meteorites are known.

 

The largish yellow patch looks like a plagioclase enriched bit with a few laths of pyroxene within it.



#8 unfindable

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Posted 07 March 2024 - 12:02 PM

Just curious - why not a terrestrial Gabbro?  I think I can see plagioclase and pyroxene - also the angular shape and lack of any fusion crust do not indicate any aerodynamic heating/ablation - but of course gabbroic meteorites are known.

 

The largish yellow patch looks like a plagioclase enriched bit with a few laths of pyroxene within it.

I am going to cut some slices today and then make new photo's of the cut surface tommorow . it is very dense and has one spot where there is a bit of iron stuck in it with oxedization. and the rock atracts a magnet a small broken of fragments stick also to a magnet.



#9 Tom Barnacle

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Posted 07 March 2024 - 01:19 PM

I am going to cut some slices today and then make new photo's of the cut surface tommorow . it is very dense and has one spot where there is a bit of iron stuck in it with oxedization. and the rock atracts a magnet a small broken of fragments stick also to a magnet.

Nice - look forwards to your results.



#10 unfindable

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Posted 07 March 2024 - 02:40 PM

Nice - look forwards to your results.

here are the first photo's, it is not visible on the photo but it has bright green inclusions like pistache color and there are cool inclions of round shapes in rivers of black material. It's amazing what i can see. it's certanly not an ordinary rock but highly metamorphosed.

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Edited by unfindable, 07 March 2024 - 03:24 PM.


#11 unfindable

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Posted 07 March 2024 - 02:42 PM

this is dried up and another angle of the whet stone notice on the right photo at the top squicly line of an unknown shiny material. The piece measures 10 x 4 x 2 cm minus mnius 13 cubic cm and weighs 212 grams what would be the density roughly.

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Edited by unfindable, 07 March 2024 - 04:10 PM.


#12 unfindable

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Posted 08 March 2024 - 11:40 AM

well itś a cool rock but just an earth rock, gabbro, norite , a plutonic rock.


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#13 lee14

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Posted 08 March 2024 - 12:27 PM

When employing the Scientific Method, negative results that disprove a hypothesis are just as important as confirmational ones that support it. You've amassed a nice collection of meteorwrongs, and that is a valuable resource in a market that is increasingly inundated with fraudulent material. 

 

Lee


Edited by lee14, 08 March 2024 - 01:53 PM.

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#14 unfindable

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Posted 08 March 2024 - 02:07 PM

When employing the Scientific Method, negative results that disprove a hypothesis are just as important as confirmational ones that support it. You've amassed a nice collection of meteorwrongs, and that is a valuable resource in a market that is increasingly inundated with fraudulent material. 

 

Lee

i certainly got an eye for weird rocks, but it is study material for me. But you can always try to sell them a pseudo meteorites for people who can't afford the real thing. Wait till you have seen my latest post. that is a very interesting stone. found between a rockpile that came from elsewhere.


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#15 unfindable

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Posted 17 March 2024 - 03:29 PM

I have to make a correction about this topic. After studying the rock better, i discovered an iron inclusion on the outer surface and it attracts a magnet and has the same apearence as an weathered iron meteorite. So i want to ask the following question: Can an earth metamorphic rock have an iron inclusion? Or do only meteorites have iron inclusions?

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#16 bigdob24

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Posted 17 March 2024 - 05:53 PM

“But you can always try to sell them a pseudo meteorites for people who can't afford the real thing.”

 

I can truthfully say you would not be on my list of trusted meteorite sellers, pseudo meteorites don’t exist.

Thankfully I can afford the real thing


Edited by bigdob24, 17 March 2024 - 07:50 PM.

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#17 unfindable

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Posted 18 March 2024 - 03:03 AM

“But you can always try to sell them a pseudo meteorites for people who can't afford the real thing.”

 

I can truthfully say you would not be on my list of trusted meteorite sellers, pseudo meteorites don’t exist.

Thankfully I can afford the real thing

oke i understand, but do you have an answer on the fact that this rock has an iron inclusion. And it is an inclusion not transfur from machines????



#18 bigdob24

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Posted 18 March 2024 - 08:58 AM

I love and collect unusual rocks and minerals, especially fluorescent . 
We live on a large rocky planet that provides unlimited combinations of different minerals that formed together and with past glacial activity , there everywhere and usually not from another world.
 


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#19 moefuzz

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Posted 26 March 2024 - 04:06 AM

  But you can always try to sell them a pseudo meteorites for people who can't afford the real thing.

That says a lot about your character



#20 unfindable

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Posted 28 March 2024 - 02:39 AM

That says a lot about your character

see last post lunar meteorite for my reaction.




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