Meteorite or Meteorwrong

Meteorite Fusion Crust

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Here are two views of a stone of the Mifflin (L5 chondrite) meteorite that landed in southwestern Wisconsin on April 15, 2010. This meteorite also shattered in the atmosphere, so the stone is rather blocky shaped but it still has a fusion crust and the edges are rounded. Where the fusion crust is chipped away, the interior is light-colored. This is common in freshly fallen chondritic meteorites. Thanks to Karl Aston for showing us the stone. Click on image for enlargement. (Photo credit: Randy Korotev)



These two photos were sent to me by people asking whether the rocks are meteorites. I'm 100% sure "yes" for the one on the left (the fellow didn't tell me where he got it ) and 99% sure for the one on the right (from Morocco). Both have cracked fusion crusts, some missing fusion crust, and regmaglypts. Click on image for enlargement.



Two views of Northwest Africa 7496 (polymict eucrite). This meteorite is very fresh; the fusion crust is still shiny. On the left, clasts are evident as protrusions. (I think this is a bit unusual.) Click on image for enlargement. Again, the interior is lighter colored than the fusion crust. Click on image for enlargement. More photos here. (Photo credit Randy Korotev).

Two views of an unnamed meteorite (probably ordinary chondrite) from the Sahara Desert. Note cracks and missing portions in the fusion crust.


This is a beautiful photo of a cracked fusion crust and many small regmaglypts on an unnamed meteorite (probably an ordinary chondrite) found in the Sahara Desert. Thanks to Habib for the photo.


Millbillillie is a rare monomict eucrite that fell in Australia in 1960. This is one of many stones. The fresh fusion crust on Millbillillie is redder than that seen on unweathered ordinary chondrite. Thanks to Karl Aston for showing us the stone. (Photo credit Randy Korotev)

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Read about vesicular fusion crusts on lunar meteorites.



Prepared by: Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please donít contact me about the meteorite you think that
youíve found until you read this and this.



Last revised: 17 April 2019