Iron, IAB complex
(Stony iron-ung in MetBull 86)
(Achondrite-ung recommended in MetBull DB)
Found October 1999
27° 11.88′ N., 16° 24.51′ E. While hunting in a well-searched area of the southeastern Dar al Gani plateau, Libya, the Pelisson’s of Sahara Work in progress. A solid natural object reaching a planet’s surface from interplanetary space. Solid portion of a meteoroid that survives its fall to Earth, or some other body. Meteorites are classified as stony meteorites, iron meteorites, and stony-iron meteorites. These groups are further divided according to their mineralogy and Click on Term to Read More Prospecting found a 130 g Meteorite composed of roughly equal amounts by weight of silicate minerals and Ni-Fe metal. The stony-irons consist of two groups: mesosiderites and pallasites. However, there is gradual shading into metal-rich stony meteorites such as the lodranites (once considered stony-irons) and silicate-rich iron meteorites. Stony-iron meteorites are less abundant than their. Although they returned to the area, they failed to Meteorite not seen to fall, but recovered at some later date. For example, many finds from Antarctica fell 10,000 to 700,000 years ago. Click on Term to Read More any other pieces of this unique meteorite (R. Pelisson, pers. comm.). It is their opinion that the high Mass of an object divided by its volume. Density is a characteristic property of a substance (rock vs. ice, e.g.). Some substances (like gases) are easily compressible and have different densities depending on how much pressure is exerted upon them. The Sun is composed of compressible gases and is much Click on Term to Read More of this meteorite might be responsible for a deeper penetration into the soil; luckily, this single individual was only half buried. Another factor that could frustrate attempts to locate more fragments of this meteorite is its proximity to a basaltic massif, which consists completely of black rocks, likely rendering any future searches futile.
Photos courtesy of R & R Pelisson—Sahara Meteorite Prospecting
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