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Yucca 040
Basic information Name: Yucca 040
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2005
Country: United States
Mass:help 247 g
Meteoritical Bulletin:  MB 104  (2015)  H6
Recommended:  H6    [explanation]

This is 1 of 6879 approved meteorites (plus 6 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Dec 2015
Writeup from MB 104:

Yucca 040        34°44.063’N, 114°13.370’W

Arizona, United States

Find: 30 Apr 2005

Classification: Ordinary chondrite (H6)

History: Found by Dennis Asher. A 37.7 g sample was donated to Cascadia on March 9, 2013.

Physical characteristics: Brownish weathering patina, with patches of weathered fusion crust present on exterior surfaces.

Petrography: Chondrules and matrix are well integrated but chondrules are clearly discernable. BSE imaging shows that silicates are equilibrated throughout. Most plagioclase grains are >50 μm across, but enough larger grains (>100 μm) are present to warrant a type 6 classification (borderline type 5). Thin section is notable for containing a large number of chromite-plagioclase objects. Numerous subparallel hydroxide veins cut across the section, with approximately 50-60% of metal and sulfide replaced by weathering product, indicative of weathering grade W2 (borderline W3). Most olivine grains show mild to moderate undulose extinction with irregular fractures suggesting a shock stage of S2.

Geochemistry: (M. Hutson and A. Ruzicka, Cascadia) Olivine (Fa18.6±0.3, N=14), low-Ca pyroxene (Fs16.5±0.3Wo1.5±0.3En82.1±0.4, N= 11).

Classification: H6 based on mineral chemistry and texture.

Specimens: Cascadia holds 29.0 g in multiple pieces, in addition to two polished thin sections and a mounted butt. Mr. Dennis Asher holds the main mass.

Data from:
  Table 0
  Line 0:
Date:30 Apr 2005
Mass (g):247.4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):18.6±0.3
Ferrosilite (mol%):16.5±0.3
Wollastonite (mol%):1.5±0.3
Magnetic suscept.:4.71
Classifier:M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):29
Type spec location:Cascadia
Main mass:Dennis Asher
Finder:Dennis Asher
Comments:Lab number CML0719; field number DA-007; possibly paired with Buck Mountains 001.; 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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United States
     Recommended::   (34° 44' 4"N, 114° 13' 22"W)

     This is 1 of 180 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1929 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)
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