![]() |
||
|
Willow Wash | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Willow Wash 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: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 20 approved meteorites classified as H3.5. [show all] Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||
Comments: | Approved 15 May 2008 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 94:
Willow Wash 35°22’24.88’’N, 115°20’’37.95’’W San Bernardino County, CA, USA Find: 14 September 2006 Ordinary chondrite (H3.5, breccia) History: The stone was found by Steve Humeston in an area covered with sand, scattered rocks and sparse native vegetation. Physical characteristics: A single stone of 552 g was recovered. It was completely covered with fusion crust. Petrography: (A. Rubin, UCLA) Chondrule outlines are well defined; there has been little integration between chondrules and matrix. Some chondrules contain glassy mesostases. The rock has been shocked; olivine grains exhibit undulose extinction under crossed polarizers in the petrographic microscope; the olivine grains contain planar fractures in their crystal structure caused by shock. The rock is moderately weathered; between 20% and 60% of the metal grains have been at least somewhat oxidized. The rock is also a breccia. It contains a clast that has experienced more significant shock than the host; much of the metal and sulfide in the clast was melted and mobilized by shock. The boundary between the clast and the host is sharp. Mineral compositions and geochemistry: The rock is unequilibrated with a large range in olivine composition (Fa 12.8–30.9 mol%, n = 13). The mean Fa content is 20.9 ± 4.7 mol% and it has a percent mean deviation (PMD for Fa) of 17.2. Classification: Ordinary chondrite (H3.5 breccia), S3, W2. Type specimens: A total sample mass of 30 g is on deposit at UCLA. The remaining mass of 472 g is in the possession of the finder. | ||||||||||||||||||||||||||||
Data from: MB94 Table 3 Line 6: |
|
||||||||||||||||||||||||||||
Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
| ||||||||||||||||||||||||||||
Geography:![]() |
Statistics: This is 1 of 263 approved meteorites from California, United States (plus 24 unapproved names) This is 1 of 1865 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters) | ||||||||||||||||||||||||||||
Proximity search: |