Angrites

Angrites are achondrites consisting largely of augite.  Augite is a pyroxene containing calcium and, in this case, some titanium and aluminum.  Olivine and plagioclase make up the remaining bulk.  Angrites are the oldest known igneous rocks and probably came from a large parent body.

Here are four photos each of three different angrites

D’Orbigny

 

NWA 2999 and a pairing

 

Sahara 99555

About the Author

John Kashuba
John is a natural history enthusiast living in Oregon.
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