compositionally linked to group IIAB
25° 06′ S., 69° 32′ W. A single iron mass weighing 13.1 kg was found by a geologist in El Guanaco, near Aguas Verde, in the Atacama Desert of Chile. The Guanaco mass was submitted for analysis to UCLA (J. Wasson), and elemental ratios were compared to those of the similar schreibersite-rich Meteorite composed mainly of iron (Fe) and nickel (Ni) in the form of two alloys, kamacite and taenite. Due to their metallic makeup and extraordinary weight, iron meteorites are easily distinguished from ordinary rocks. Also, because they rarely break up in the air and suffer much less from the effects Click on Term to Read More, La Primitiva, which was also found in the Atacama Desert in Chile. The two iron meteorites exhibit significant differences, notably, in the ratios of As, The astronomical unit for length is described as the "mean" distance (average of aphelion and perihelion distances) between the Earth and the Sun. Though most references state the value for 1 AU to be approximately 150 million kilometers, the currently accepted precise value for the AU is 149,597,870.66 km. The Click on Term to Read More, and Ir, and it was determined that they represent separate falls. Minor Melted exterior of a meteorite that forms when it passes through Earth’s atmosphere. Friction with the air will raise a meteorite’s surface temperature upwards of 4800 K (8180 °F) and will melt (ablate) the surface minerals and flow backwards over the surface as shown in the Lafayette meteorite photograph below. Click on Term to Read More was reportedly found on the exposed surface of the Guanaco mass, attesting to a relatively recent Meteorite seen to fall. Such meteorites are usually collected soon after falling and are not affected by terrestrial weathering (Weathering = 0). Beginning in 2014 (date needs confirmation), the NomComm adopted the use of the terms "probable fall" and "confirmed fall" to provide better insight into the meteorite's history. If Click on Term to Read More.
Guanaco—photo courtesy of Atacama Desert Meteorites
Twannberg—Top: complete stone photographed by Rolf Buehler; Bottom: sectioned main mass
click on the bottom photo for an enlarged view
La Primitiva—a 74.2 g full slice of this IIG iron
Photo courtesy of Sergey Vasiliev—SV-meteorites