The Pułtusk meteorite fell down near Pułtusk in the form of a shower of aerolites, spreading over an area of 127 km², between the villages of Tocznabiel, Wielgołas (from the south-west) as well as Rzewnie and Boruty (from the north-east). The “ball of fire” flew from south-west to north-east, dragging a whitish bent tail. This phenomenon was watched in many places in Poland, including, for example, Wrocław, Gdańsk, Königsberg, Kraków and Lviv.
In the classification of meteorites, Vaca Muerta belongs to a small group of iron and stone meteorites known as mesosiderites. Mesosiderites are meteorites containing both stone and iron parts. Metal does not constitute a consolidated and unbroken structure, but appears in the form of larger or smaller fragments of meteorite iron melted into a mass of silicate minerals.
In the meteorite classification, Imilac belongs to a small group called pallasites. They are intermediate meteorites between stony and iron meteorites. The metal does not constitute a conjoined and uninterrupted structure here, but it occurs in the form of larger and smaller fragments of meteorite iron fused with a mass of silicate minerals, mainly olivines.