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Bunburra Rockhole
Basic information Name: Bunburra Rockhole
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 2007
Country: Australia
Mass:help 324 g
Meteoritical Bulletin:  MB 95  (2009)  Achondrite (Eucrite)
Recommended:  Eucrite    [explanation]

This is 1 of 605 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 13 Feb 2009
Revised 17 Apr 2009: release coords
Writeup from MB 95:

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.

Type specimens: Both stones (main mass) and one thin section are on deposit at WAM.

Data from:
  Table 6
  Line 1:
State/Prov/County:Nullarbor Region, South Australia, Austr
Mass (g):324
Class:Achondrite (Eucrite)
Ferrosilite (mol%):62.5
Wollastonite (mol%):3.6
Classifier:Gretchen K. Benedix, NHM and Philip A. Bland, ICL
Type spec mass (g):324
Type spec location:WAM
Main mass:WAM
   and collections
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011)
WAM: Department of Earth & Planetary Sciences, Western Australian Museum. Locked Bag 49, Welshpool DC, Western Australia 6986, Australia; Website (institutional address; updated 18 Oct 2011)
ICL: Impacts and Astromaterials Research Centre, Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom (institutional address)
References: Published in Meteoritical Bulletin, no. 95, MAPS 44, 429-462 (2009)
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     Recommended::   (31° 21' 0"S, 129° 11' 24"E)

     This is 1 of 241 approved meteorites from South Australia, Australia (plus 3 unapproved names) (plus 4 impact craters)
     This is 1 of 719 approved meteorites from Australia (plus 11 unapproved names) (plus 27 impact craters)
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