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Patch of fusion crust, remnant fusion crust?

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#1 unfindable

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Posted 10 February 2024 - 10:38 AM

I found an interesting rock which is some kind of breccia and has allot of iron oxide brown patches with a certain texture. Could this be remnant fusion crust? And can someone post picture of brown weathered remant fusion crust and i mean realy old and weathered patches of fusion crust.

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#2 lee14

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Posted 10 February 2024 - 11:23 AM

If it's 'really old', there is no remaining fusion crust. A true fusion crust is quite thin and succumbs to long term weathering and leaves no remnants. What is sometimes mistaken for a fusion crust on weathered irons is simply layers of oxidized iron, that, as it flakes off, can appear to be crust. It's just a patina. The dark material is this image is neither.

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#3 unfindable

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Posted 10 February 2024 - 12:54 PM

If it's 'really old', there is no remaining fusion crust. A true fusion crust is quite thin and succumbs to long term weathering and leaves no remnants. What is sometimes mistaken for a fusion crust on weathered irons is simply layers of oxidized iron, that, as it flakes off, can appear to be crust. It's just a patina. The dark material is this image is neither.

Lee

It depends how long a meteorite has been on earth and what conditions it suffered. What is evedent on this rock is that the so called "remnant crust"is contained within de deeper areas. And it lookes like rust but a darker brown. And it is all over the rock

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#4 lee14

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Posted 10 February 2024 - 02:22 PM

Fusion crusts are not brown. And they are neither restricted to nor preserved by,'deeper areas'.What is evident regarding this stone is that has likely been worn smooth in a water borne environment. 

 

Lee


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#5 Sincos

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Posted 10 February 2024 - 05:34 PM

What is the basis of the legal system , ‘ innocent until proven guilty ‘ , does not have a corollary in meteorite identification . One can not assume it is a meteorite until proof otherwise but rather it is not a meteorite until proof to the contrary.


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#6 unfindable

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Posted 11 February 2024 - 05:36 AM

Fusion crusts are not brown. And they are neither restricted to nor preserved by,'deeper areas'.What is evident regarding this stone is that has likely been worn smooth in a water borne environment. 

 

Lee

Yep, google photo search reveils river rock, but i could have known that because the rock is too round.



#7 Tom Barnacle

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Posted 02 March 2024 - 09:04 AM

I found an interesting rock which is some kind of breccia and has allot of iron oxide brown patches with a certain texture. Could this be remnant fusion crust? And can someone post picture of brown weathered remant fusion crust and i mean realy old and weathered patches of fusion crust.

This is a granite cobble with a bit of mineral veining. It looks like it may derive from an unconsolidated sediment such as a glacial till or river bed due to the oxidation of the outer skin which is the brown colouration you see.

 

Now, there is a saying that if you kiss enough frogs, one of them will turn out to be a Prince or Princess (depending on your orientation), but compared to the chances of finding a meteorite by going through lots of random stones, the odds of finding your match amongst all those amphibian are pretty good.

 

But don't be put off by me, my house is full of stones, igneous, metamorphic, sedimentary - I love them all!


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#8 unfindable

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Posted 02 March 2024 - 12:18 PM

This is a granite cobble with a bit of mineral veining. It looks like it may derive from an unconsolidated sediment such as a glacial till or river bed due to the oxidation of the outer skin which is the brown colouration you see.

 

Now, there is a saying that if you kiss enough frogs, one of them will turn out to be a Prince or Princess (depending on your orientation), but compared to the chances of finding a meteorite by going through lots of random stones, the odds of finding your match amongst all those amphibian are pretty good.

 

But don't be put off by me, my house is full of stones, igneous, metamorphic, sedimentary - I love them all!

Well after all the post i have done i know one thing for sure, meteorites are  extremely hard to find and are extremely rare. But by wrestling  through all the meteorwrongs i learn allot what not to look for and know what a real meteorite must have. I apreciate all the comments and have learned allot.


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