Ozerki fell June 21, 2018 in Lipetsk oblast, European Russia, about 240 miles south of Moscow. More than a hundred stones were found totaling over 10kg. It is an L6 ordinary chondrite.
Various shock levels are reported. The stone from which our thin section was made has been strongly shocked. It is a breccia of L6 clasts within solidified melt. Mineral grains exhibit undulatory extinction.
Metal and sulfides were mobilized by shock and are present as crosscutting veins, opaque blebs within the melt and injected between minerals and in cracks in mineral grains. In reflected light the opaque drops in the melt and some within the L6 material have a distinctive metal-troilite intergrowth texture.
The melt rock matrix is translucent in thin section, unlike many meteorites whose melt is opaque and some whose melt is glassy transparent. The Ozerki melt devitrified into micro crystals, presumably during a somewhat extended cooling. Microscopic acicular crystals are massed at some depth on the surface of the intact L6 clasts generally parallel with each other and perpendicular to the surface of the clasts.
One patch of another melt, some remnant fusion crust, also had time to form a crystalline layer – beneath a glassy vesiculated exterior. I believe that, in one spot there, we have an instance of epitaxy.