Although they all share similar compositions, Cold Bay is derived from a more evolved magma than that which formed Eagle Station. Cold Bay is one of the five representatives of the Eagle Station group. This "silicated rust" has experienced selective corrosion of kamacite, i.e., the fine kamacite that was originally a constituent of plessite has been oxidized. Many corroded fragments of this pallasite, having a combined weight of 320 g, were found in Alaska, USA in June 1921. Shown in the photo above is a 185 g end section, acquired from the Jim Schwade Collection, previously part of the Vienna Museum Collection. These pallasites have different metal and olivine compositions than those of the main-group clan. Eagle Station is the type specimen for a unique pallasite group consisting of Eagle Station, Cold Bay (see below), Itzawisis, Karavannoe, and Oued Bourdim 001. The photo above shows a 75 g slice from the 1,340 g main mass purchased from the finder.Ī single 36.3 kg pallasite was found in Kentucky, USA in 1880. In addition, Milton also has unique O-isotope ratios, suggesting an origin from a previously unsampled asteroid. Olivine comprises ~73 vol% in Milton, which, along with the FeNi-metal, is chemically different from other pallasites. The photo above shows a 94.4 g partial slice, acquired from the Jim Schwade Collection, previously obtained from David New following acquisition from Arizona State University, Center for Meteorite Studies.Ī single 2,038 g pallasite was found in Missouri, USA in October 2000. Olivines occur as a mixture of rounded crystals and small, sharp fragments. Phillips County is unusually troilite-rich and has olivine with an anomalously high fayalite content, leading to its designation as an anomalous member of the main-group. In the photo above is a 168 g partial slice, acquired in trade from the United States National Museum, Smithsonian Institution.Ī single 1.4 kg pallasite was found in Colorado, USA in 1935. Giroux has a composition which places it in the main-group. The photo above shows a stunning 67.05 g slice of this rare fall, acquired from the Russian Academy of Sciences.Ī single 4.275 kg pallasite was found by Francis Langill in Manitoba, Canada during the winter of 1954. Omolon is one of only three verified pallasite falls, sharing this distinction with Marjalahti and Zaisho, and has a composition which places it in the main-group.
This mass was finally recovered a few years later.
Piatek for sharing his rare pallasite collection on .Ī pallasite was seen to fall on May 16, 1981, and a single 253.5 kg mass was located a short time thereafter along the Omolon River in the Magadan region of the USSR. I'd like to express my appreciation to Dr. The pallasites displayed on this page are seldom represented in private collections, and some not at all. PALLASITES: A Rare View I To display this page you need a browser with JavaScript support.