Uasara, IIAB

Meteoritical Bulletin entry for Uasara. Sierra Gorda and Negrillos are both described as being heavily weathered in Vagn F. Buchwald’s Handbook of Iron Meteorites.  The “ragged” surface noted in the published description of this meteorite as evidence of weathering was a late fracture covered with frothy fusion crust (see images).  So, this iron isn’t paired.

In fact, given the pristine condition of the meteorite, I see little reason to doubt the finder’s story; Uasara is likely a witnessed fall.  This iron is featured on page 64 of the Field Guide to Meteors and Meteorites, by O. Richard Norton & Lawrence A. Chitwood.  It is a remarkable example of an oriented meteorite.

3.1 kilograms