6/11/2023 0 Comments Allende meteoriteThe greater shock compression responsible for the decreased porosity in the reduced CV meteorites is also manifest in the relatively high degree of chondrule deformation and the relatively low matrix/inclusion ratio (Fagan et al., 2019). (2011), the CV oxidized subgroup has a greater porosity (22≢3%) than the CV reduced subgroup (0.6≨.3%). From the studies conducted by Macke et al. In addition, the grain density can be readily estimated from the mode data, and therefore, in combination with the calculated bulk density, the porosity can be determined. (2004) to determine the modal mineralogy of Allende, and to quantify the compositional range of the olivine phases. X-ray diffraction techniques and Mössbauer spectroscopy have been used by Bland et al. The total recovered weight of the Allende fall was over 3 tons, a record at that time for stone meteorites that was surpassed by the Jilin, China fall in 1976 weighing ~4 tons. This specimen was estimated to have weighed ~110 kg before it was fragmented upon impact with the hard soil. The meteorite created a crater 32 inches by 52 inches and 13 inches deep, having a small rim on the north end. The largest recovered specimen was found eight months after the fall by Guadalupe Juarez as he was hunting a rabbit. Material was quickly collected by both scientific and commercial interests, and within a few weeks research laboratories around the world were studying this new fall. A stone found in the village of Pueblito de Allende was taken to the newspaper office where news of the fall was disseminated rapidly. Thousands of individual stones fell, creating the largest stone strewn field recorded, measuring 50 km in length and at least 300 km² in area. ALLENDEĪt 1:05 on a Saturday morning, accompanied by strong detonations, a previously rare carbonaceous chondrite approached rural Mexico from the southsouthwest (approximately 215°) at a low-angle trajectory. This meteorite is unusual as it contains about 14,000 organic compounds including 70 amino acids – a discovery supporting the view that early life may have been brought to Earth by meteorites similar to Murchison.ALLENDE PHOTO To display this page you need a browser with JavaScript support. ![]() Every year, around 40,000 tons of material from outer space falls to Earth: often as tiny specks of dust. Near the town of Murchison, Victoria, Australia, 10.58 a.m, 28 September, 1969. Its mineral grains have been dated to 4566 million (plus or minus one or two million) years old, pre-dating the formation of the Earth itself. The Allende meteorite is about the oldest object in the Solar System and is made up of material which has remained unaltered since the time before our Sun and planets formed. Pueblito de Allende, Chihuauha, Mexico, 1.05 a.m, 8 February, 1969. In the foreground are two meteorites – Allende and Murchison on loan from the Museum für Naturkunde, Berlin for the duration of the exhibition.Īllende meteorite, weighs 276 grams. Installation view of STEINE featuring stones of a biological and geological nature with amulet and films beyond.
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