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Yucca 035 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Yucca 035 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: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 77 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 27 Feb 2016 | ||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 105:
Yucca 035 34°42.063’N, 114°11.259’W Arizona, United States Find: 2005 Oct 9 Classification: Ordinary chondrite (H3-6) History: Dennis Asher found this stone on October 9, 2005, and later donated it to Cascadia. Physical characteristics: All surfaces are covered with weathering products, consisting of patches of orange rust, tan clay and pink caliche. No remnant fusion crust is present. Petrography: In thin section, composed mostly of an intimate mixture of mineral and chondrule fragments with diverse (type 3-6) characteristics; one discrete type 6 clast is also present. BSE imaging shows that most of the rock ("host") is composed of type 4-6 lithologies, with equilibrated olivine, and plagioclase varying from smaller (to 50 µm across) to rarely coarser (>100 μm) grains; the host also contains ~5-10% material characteristic of type 3 including zoned or more magnesian and ferroan olivine grains, feldspathic glass, and magnesian pyroxene. Discrete type 6 clast contains coarse feldspar (50-100 μm grains). Individual grains of a silica polymorph were observed, as well as three grains of low-Ca pyroxene with relatively high (3.4-4.7 wt% Al2O3) alumina content, similar to those reported for Buck Mountain Wash. A number of small chromite-plagioclase objects are present, as are grains of metallic copper. Many fragments and metal and troilite roughly align. Opaques show minor weathering (~5-10% replacement by Fe-hydroxides). Shock effects in olivine are variable across the section, with most grains having undulose extinction and one set of planar fractures, consistent with a shock stage of S3. Geochemistry: (M. Hutson and A. Ruzicka, Cascadia) Host dominated by equilibrated olivine (median Fa18.9, N=127), and low-Ca pyroxene (median Fs15.3, N=86), but also containing more magnesian and ferroan olivine (Fa2.1-51.2) and low-Ca pyroxene (Fs5.7-30.8). Overall average host including mixture of both equilibrated and more varied compositions is olivine (Fa19.6±5.8, N=127), low-Ca pyroxene (Fs13.4±5.7Wo1.3±1.3En85.3±5.8, N= 86). Type 6 clast olivine (Fa19.4±1.3, N=7) and low-Ca pyroxene (Fs17.1±0.5En81.2±1.0Wo1.7±0.6, N=4). Classification: H3-6 finely intermixed genomict breccia. Type 5-6 lithology implied by larger feldspar grain sizes and abundant equilibrated olivine and pyroxene as well as discrete type 6 chondrite clast; type 3 lithology implied by common presence of magnesian and zoned olivine and feldspathic glass. Paired with Buck Mountain Wash on the basis of mineralogy, mineral chemistry, and texture. Specimens: Cascadia holds 35.9 g in multiple pieces, in addition to two polished thin sections and a mounted butt. | ||||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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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) |
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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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Geography:![]() |
Statistics: This is 1 of 178 approved meteorites from Arizona, United States (plus 1 impact crater) This is 1 of 1919 approved meteorites from United States (plus 867 unapproved names) (plus 28 impact craters) | ||||||||||||||||||||||||||||||||
Proximity search: |