Classification led by Cesca Willcocks

This meteorite belongs to Sean Mahoney.

This meteorite will possibly receive an official name of '***' - to be confirmed by the Nomenclature Committee of the Meteoritical Society.

The type specimen (***) will be on deposit at the University of Plymouth, along with a single, polished thin section.

Porphyritic chondrules are identified by their large grains of olivine and/or low-Ca pyroxene, surrounded by a fine grained or glassy plagioclase matrix. These chondrules can also be broken down into iron-rich and iron-poor types depending on their iron content. In OSM 015, we found Porphyritic Olivine (PO) chondrules (where their large grains are olivine in compositions), as well as Porphyritic Pyroxene (PP) chondrules, where their large grains are pyroxene in composition. We also found Porphyritic Olivine-Pyroxene chondrules, where the larger grains comprised of both olivine and pyroxene.

Non-porphyritic chondrules are less common than porphyritic chondrules and can also be broken down into a number of groups. These include crypto-crystalline chondrules (lacking in any crystal structure) and radial pyroxene chondrules (made up of low-Ca pyroxene that radiates from a point near the rim of the chondrule). In OSM 015 we found many radial pyroxene chondrules, in particular the one displayed on the right that exhibits thin, low-Ca pyroxene grains radiating from the left side of the chondrule.