Ash Creek (L6 chondrite) meteorite was an observed fall in Texas
on February 15, 2009. The meteor was captured on
video, where it is seen to break apart. Hundreds of small stones
have been found around the town of
West, Here are 11 of them from the collection of Karl Aston.
The stone in the lower left is the most rounded by ablation. It
has a complete fusion crust and some regmaglypts. Among these stones, it
is probably the earliest to have broken off the main mass of the
original meteoroid. Several
other stones have complete or nearly complete fusion crusts, regmaglypts,
and edges rounded by ablation. These
stones probably formed lower in the atmosphere. The large stone
in the middle has a smooth, dark fusion crust on the bottom side
that we can't see, but on top there's a light fusion crust and only
a little ablation. This break must have happened at even lower altitude,
but still high enough that heating occurred. Finally,
some stones have breaks and chips that happened low in the atmosphere
or upon hitting the earth. The light-colored interior is visible
on these stones. (Photo by Randy Korotev. Thanks to Karl Aston for
showing us the stones.)
This is one of the many Park
Forest (L5 chondrite) stones that fell in Chicago on March 26,
2003. This one went through a roof and broke into four pieces. (Thanks
to Karl Aston for showing us the stones.) Many Park Forest stones
have a patchy fusion crust. The meteorite is a breccia, with light
gray clasts in a dark matrix. Thanks to Carrie Seniw for the photos.
I was sent these photos by someone in Morocco claiming that they
are photos of lunar meteorite NWA 7325. Maybe they are, maybe they're
not, but they are good photos of fusion crust. The stones are about
2-3 cm in size.
This is another photo of a broken meteorite sent to me by someone
in Morocco. The meteorite is a bit weathered. The fusion crust has
lost its gloss. You can't see the metal, but you can see rusty spots.