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Yucca 042
Basic information Name: Yucca 042
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2004
Country: United States
Mass:help 945 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H3-6
Recommended:  H3-6    [explanation]

This is 1 of 74 approved meteorites classified as H3-6.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 7 Jul 2016
Writeuphelp
Writeup from MB 105:

Yucca 042        34°44.055’N, 114°12.397’W

Arizona, United States

Find: 10 Mar 2004

Classification: Ordinary chondrite (H3-6)

Petrography: In thin section, the sample appears to be relatively integrated, grading from material with a texture resembling a type 5 chondrite comprised primarily of chondrule fragments to material resembling a type 4 chondrite comprised of well-defined chondrules amidst chondrule fragments. Smaller chondrule and mineral fragments occur between chondrules and larger chondrule fragments; lithic clasts are absent. BSE imaging shows that most of the meteorite contains equilibrated silicate, but that there is a substantial (~10 area %) admixture of type 3 material (both magnesian and iron-rich zoned olivine and pyroxene grains). Most of the equilibrated material contains devitrified glass or small (< 50 μm) plagioclase feldspar grains; coarse (>50 μm) plagioclase is also present. Chlorapatite, merrillite, chromite-plagioclase objects, and metallic copper were observed.

Geochemistry: (M. Hutson and A. Ruzicka, Cascadia) Representative analyses for fragments and chondrules (both equilibrated and unequilibrated grains): olivine (Fa18.9±5.4, N=104), low-Ca pyroxene (Fs16.2±3.6Wo1.3±0.8, N= 66), plagioclase feldspar (Ab79.7±2.2Or5.8±2.7, N=17).

Classification: Sample represents an intimate mixture of fragmental material. Type 3 is inferred from presence of zoned magnesian and ferroan olivine grains; type 6 from coarse (>50 μm) plagioclase feldspar grains. Sample is classified as an H3-6 genomict breccia. May be paired with Buck Mountain Wash (Yucca 002).

Specimens: Cascadia holds 28.6 g in multiple pieces, in addition to one polished thin section and a mounted butt.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Arizona
Origin or pseudonym:upland pediment
Date:10 Mar 2004
Latitude:34°44.055'N
Longitude:114°12.397'W
Mass (g):945
Pieces:1
Class:H3-6
Shock stage:S4
Weathering grade:W1
Classifier:M. Hutson, Cascadia
Type spec mass (g):28.6
Type spec location:Cascadia
Main mass:Larry Sloan
Finder:Steve Woods
Comments:Lab number CML0721.; submitted by A. Ruzicka
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography:

United States
Coordinates:
     Recommended::   (34° 44' 3"N, 114° 12' 24"W)

Statistics:
     This is 1 of 170 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1871 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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