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Yucca 038
Basic information Name: Yucca 038
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2006
Country: United States
Mass:help 10.4 g
Meteoritical Bulletin:  MB 105  (2016)  H5
Recommended:  H5    [explanation]

This is 1 of 11988 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Feb 2016
Writeup from MB 105:

Yucca 038        34°42.845’N, 114°10.697’W

Arizona, United States

Find: 2006 Oct

Classification: Ordinary chondrite (H5)

History: Purchased by Dennis Asher from the finder, John Wolfe, and later donated to Cascadia.

Physical characteristics: A dark reddish-brown weathering patina covers all exterior surfaces. Weathered fusion crust covers two sides.

Petrography: Chondrules (mean diameter = 0.67±0.29 mm, N=17) and matrix are well integrated. Chondrule mesostases are crystalline with plagioclase feldspar grains commonly ~5 μm across; larger interchondrule feldspars are 20-40 μm across. The sample contains about 0.3% metal, 1.8% troilite, and 5.3% hydroxide (weathering product, often in veins) based on modes determined from reflected light images Most olivine grains show mild to moderate undulose extinction with irregular or planar fractures, consistent with shock stage S2.

Geochemistry: (M. Hutson and A. Ruzicka, Cascadia) Olivine (Fa19.3±1.6, N=52), low-Ca pyroxene (Fs17.0±1.1Wo1.3±0.8En81.6±1.1, N= 19). Variability could be caused in part by unavoidable analysis overlap with weathering products.

Classification: H5 chondrite based on mineral chemistry and texture, although chondrule size, magnetic susceptibility, and potential pre-weathering metal content are more consistent with an L chondrite. A high proportion of hydroxide suggests weathering grade W3.

Specimens: Cascadia holds 9.7 g in multiple pieces, in addition to one polished thin section.

Data from:
  Table 0
  Line 0:
Date:2006 Oct
Mass (g):10.4
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):19.3±1.6
Ferrosilite (mol%):17.0±1.1
Wollastonite (mol%):1.3±0.8
Magnetic suscept.:4.64
Classifier:M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):9.7
Type spec location:Cascadia
Main mass:Cascadia
Finder:John Wolfe
Comments:Lab number CML0717; Field number CML-DA-10.2.; submitted by A. Ruzicka
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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United States
     Recommended::   (34° 42' 51"N, 114° 10' 42"W)

     This is 1 of 180 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1930 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)
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