Bunburra Rockhole !
31°21.0′S, 129°11.4′E
Nullarbor Region, South Australia, Australia
Fall: 21 July 2007 04:43:56 local time (UT + 9:30)
Achondrite (eucrite)
History: A bright fireball was recorded over southwestern Australia by observatories of the Desert Fireball Network. A fall position was pinpointed by triangulation, and a search was mounted. Fragments were recovered within 100 m of the predicted fall site.
Physical characteristics: Two specimens with a total mass 324 grams were recovered: one 150 g fragment; one 174 g fragment. The smaller is an oriented stone, discus-shaped, and completely fusion crusted. The larger is ~90% fusion crusted, and more irregular in form. The small internal area that is exposed on the second stone is pale grey in color. Fusion crust on both stones is bright, shiny, and fresh.
Petrography (G. K. Benedix NHM; P. A. Bland ICL): The meteorite is a basaltic eucrite monomict breccia with the majority of the sample exhibiting subophitic texture. Fine-grained clasts are irregularly distributed throughout the sample. The sample contains mm-sized orthopyroxene and plagioclase. Low-Ca pyroxene contains thin exsolution lamellae of Ca-rich pyroxene. The meteorite also contains silica and minor ilmenite.
Mineral compositions: Pyroxene, Fs62.5Wo3.6 (Fe/Mn-31.1) with augite (Fs27.7Wo43.0) lamellae; plagioclase, An84.1 to An88.2.
Classification: Achondrite (eucrite) minimal shock and no weathering.
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Sujet: Meteorite #854 : Bunburra Rockhole 
Ven 25 Sep - 23:17
