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Sawtooth Mountain
Basic information Name: Sawtooth Mountain
     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:help 217 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 495 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 10 Jan 2015
Writeuphelp
Writeup from MB 104:

Sawtooth Mountain        38°20’46"N, 106°57’41”W

Colorado, United States

Found: 2006

Classification: Ureilite

History: This meteorite was found by Eldon Surbeck in the summer of 2006. He was hunting for fossils on a shale exposure/talus slope when he noticed a stone that looked out of place sitting on the outcrop. He picked it up and took it home thinking that it might be a meteorite.

Physical characteristics: Single stone, oriented. Dark weathered fusion crust covered exterior with rind ~3 mm thick. A saw cut reveals dark polycrystalline texture with many thin, macroscopic, graphite grains, some up to 4 mm long.

Petrography: (C. Agee, UNM) Examination of a polished mount shows polygonal olivine and pigeonite grains (300-1000 μm) with triple junctions. Most olivines have fine Fe-metal blebs on grain boundaries and along fractures. Ubiquitous graphite, often as elongate mm-size domains. Fe-metal and oxidized metal occupying most silicate grain boundaries. Chromite is present.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa24.9±3.0, Fe/Mn=55±9, Cr2O3=0.46±0.01, n=15; pigeonite Fs20.8±0.1Wo11.8±0.1, Fe/Mn=33±2, Cr2O3=1.07±0.01 wt%, n=10.

Classification: Achondrite (ureilite)

Specimens: 21.8 g including a probe mount on deposit at UNM, Reed holds the main mass.

Data from:
  MB104
  Table 0
  Line 0:
State/Prov/County:Colorado
Date:2006
Latitude:38°20'46"N
Longitude:106°57'41”W
Mass (g):216.6
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):24.9±3.0
Ferrosilite (mol%):20.8±0.1
Wollastonite (mol%):11.8±0.1
Classifier:C. Agee, UNM
Type spec mass (g):21.8
Type spec location:UNM
Main mass:Blaine Reed
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:

United States
Coordinates:
     Recommended::   (38° 20' 46"N, 106° 57' 41"W)

Statistics:
     This is 1 of 89 approved meteorites from Colorado, United States (plus 5 unapproved names)
     This is 1 of 1824 approved meteorites from United States (plus 349 unapproved names) (plus 28 impact craters)
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