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Tungsten Mountain 121
Basic information Name: Tungsten Mountain 121
     This is an OFFICIAL meteorite name.
Abbreviation: TM 121
Observed fall: No
Year found: 2001
Country: United States
Mass:help 2.6 g
Meteoritical Bulletin:  MB 109  (2020)  H5
Recommended:  H5    [explanation]

This is 1 of 11567 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 7 Jul 2020
Writeup from MB 109:

Tungsten Mountain 121 (TM 121)        39°41.2412’N, 117°37.3834’W

Nevada, United States

Find: 5 Aug 2001

Classification: Ordinary chondrite (H5)

History: While conducting meteorite recovery on a dry-lake in Edwards Creek Valley, Robert Verish found this stone fragment on 2001-08-05

Physical characteristics: One 2.6 g stony fragment, teardrop-shaped (15 × 7 × 7 mm) having dark-brown, hackly exterior with a black patina, but no fusion-crust. Protruding through the exterior is one large (1 × 0.75 mm) oval chondrule. Saw-cut reveals light-brown interior with many metal-grains and visible chondrules. Basically, a typical-looking fragment of a H-chondrite from this this dry-lake in Edwards Creek Valley.

Petrography: (D. Sheikh, FSU) Low chondrule abundance (200-1000 µm, n=9). Sample is composed of olivine, low-ca pyroxene, recrystallized plagioclase (average size 6±1 µm), troilite, Fe-Ni metal, Fe-oxides, and chromite.

Geochemistry: Olivine (Fa18.7±0.8, n=23), Low-Ca Pyroxene (Fs16.4±0.7Wo1.0±0.3, n=12).

Classification: Ordinary Chondrite (H5)

Specimens: 1 g at UCLA; main mass with Verish.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:drylake
Date:5 Aug 2001
Mass (g):2.6
Shock stage:S3
Weathering grade:W4
Fayalite (mol%):18.7±0.8 (N=23)
Ferrosilite (mol%):16.4±0.7 (N=12)
Wollastonite (mol%):1.0±0.3 (N=12)
Classifier:D. Sheikh, FSU
Type spec mass (g):1
Type spec location:UCLA
Main mass:Verish
Finder:Robert Verish
Comments:Fieldname = ECVB13; lab ID# = V-B13; abbr. = TM 121; submitted by Daniel Sheikh
   and collections
TM: Geoscience Museum, Transvaal Museum, P. O. Box 413, Pretoria 0001, South Africa (institutional address; updated 3 Mar 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Verish: Robert Verish, Meteorite-Recovery Lab, P.O. Box 463084, Escondido, CA 92046, United States; Website (private address; updated 27 May 2009)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Public domain photographs:
Daniel Sheikh      

United States
     Recommended::   (39° 41' 14"N, 117° 37' 23"W)

     This is 1 of 184 approved meteorites from Nevada, United States (plus 4 unapproved names)
     This is 1 of 1927 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)
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