At 12:52 A.M. near Lowicz, Poland, a shower of stones was seen and heard to fall over an area of 9.2 km² along a trajectory from west to east. However, in contrast to most other fall distributions, the smallest fragments were recovered in the farthest part of the strewnfield near Seligow, while the larger pieces were found in the closest part in Krepa. This reversed distribution could be the result of fragmentation low in the atmosphere. At least 83 and perhaps over 100 stones with a total weight of over 60 kg were eventually recovered, but many were subsequently lost during World War II.
Mesosiderites have been separated into distinct groups (Floran, 1978 and Hewins, 1984) based on their composition and degree of thermal metamorphism, with Lowicz falling into group A3 (see the Bondoc page for further information about this classification scheme). The formation of mesosiderites has been examined in the context of several different models. See the Estherville page for details concerning the most current models.
Lowicz has a CRE age of ~53 m.y. The specimen shown above is a very thin partial slice measuring 19 mm × 11 mm × 1 mm. It weighs 0.9 g and exhibits abundant metal mixed with the silicates.