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Stewart Valley 024
Basic information Name: Stewart Valley 024
     This is an OFFICIAL meteorite name.
Abbreviation: StV 024
Observed fall: No
Year found: 2017
Country: United States
Mass:help 158.2 g
Classification
  history:
Recommended:  H3    [explanation]

This is 1 of 594 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 20 Jul 2018
Writeuphelp
Writeup from MB 107:

Stewart Valley 024 (StV 024)        36°14.991’N, 116°10.319’W

Nevada, USA

Find: 2017 Jan 07

Classification: Ordinary chondrite (H3)

Petrography: Chondrules are very sharply defined, but none appear to contain isotropic glassy mesostases, suggesting a high type-3 classification.  Chondrule types include, PO, PP, POP, BO, RP and C.  Olivine grains exhibit sharp optical extinction, indicative of shock stage S1. However, some of the troilite grains are polycrystalline, suggesting the rock was shocked and then annealed.  Consistent with this is the occurrence of small irregular troilite grains within some grains of metallic Fe-Ni, probably a feature formed by localized shock melting. There are no observable crystalline plagioclase grains.  More than 95% of the metal and troilite grains have been transformed into limonite and goethite by terrestrial weathering.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Nevada
Origin or pseudonym:Dry Lake Bed
Date:2017 Jan 07
Latitude:36°14.991'N
Longitude:116°10.319'W
Mass (g):158.2
Pieces:1
Class:H3
Shock stage:S1
Weathering grade:W5
Fayalite (mol%):18.0±0.2 (n=19)
Ferrosilite (mol%):16.1±0.2 (n=15)
Wollastonite (mol%):1.5±0.1
Classifier:A.Rubin, UCLA
Type spec mass (g):20
Type spec location:UCLA
Main mass:Ken Eltrich
Finder:Ken Eltrich
Comments:Submitted by Ken Eltrich
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. 107, in preparation (2018)
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Photos:
CreditPhotos
Public domain photographs:
Ken Eltrich   
Geography:

United States
Coordinates:
     Recommended::   (36° 14' 59"N, 116° 10' 19"W)

Statistics:
     This is 1 of 138 approved meteorites from Nevada, United States (plus 4 unapproved names)
     This is 1 of 1834 approved meteorites from United States (plus 358 unapproved names) (plus 28 impact craters)
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