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Rio Rancho
Basic information Name: Rio Rancho
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2011
Country: United States
Mass:help 1001 g
Meteoritical Bulletin:  MB 101  (2012)  L6
Recommended:  L6    [explanation]

This is 1 of 12662 approved meteorites (plus 8 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 24 Jul 2012
Writeup from MB 101:

Ri­o Rancho        35°18 N, 106°38’W

New Mexico, USA

Found: 2011 Sept 16

Classification: Ordinary chondrite (L6)

History: Jansen Lyons, age 13, found this meteorite within the city limits of Ri­o Rancho, New Mexico, in an area where no other stones were exposed. The coordinates are rounded to nearest minute to protect the homeowner's privacy.

Physical characteristics: Single stone, exterior covered by approximately 75% dark weathered fusion crust, saw cut reveals a partially iron-stained interior with evenly dispersed fine-grained metal/sulfide and faint chondrule outlines.

Petrography: (C. Agee, UNM) Microprobe examination of a probe mount shows approximately 50% olivine, 25% orthopyroxene, 10% plagioclase. Accessory clinopyroxene, Cr-spinel, Cl-rich apatite (up to 300 μm), merrillite, ubiquitous kamacite and troilite. Weathering veinlets of iron-oxide and barite are found throughout the meteorite. Recrystallized relict chondrules are present, some with remnant barred-olivine textures.

Geochemistry: (C. Agee and N. Wilson, UNM) Olivine Fa25.5±0.4, Fe/Mn=52±3, n=4; orthopyroxene Fs22.2±0.5Wo1.5±0.1, Fe/Mn=31±2, n=5; clinopyroxene Fs8.6Wo44.9, Fe/Mn=25, n=1; plagioclase Or11±3Ab69±6An21±6.

Classification: Ordinary chondrite (L6), weathering grade W2.

Specimens: 28 g including a probe mount on deposit at UNM, Jansen Lyons holds the main mass.

Data from:
  Table 0
  Line 0:
State/Prov/County:New Mexico
Date:2011 Sept 16
Latitude:35°18 N
Mass (g):1001
Weathering grade:W2
Fayalite (mol%):25.5±0.4
Ferrosilite (mol%):22.2±0.5
Wollastonite (mol%):1.5±0.1
Classifier:C. Agee, UNM
Type spec mass (g):28
Type spec location:UNM
Main mass:Jansen Lyons
Finder:Jansen Lyons
Comments:Submitted by C. Agee
   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)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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    (Caution, these are of unknown reliability)
Jansen Lyons   

United States
     Recommended::   (35° 18'N, 106° 38'W)

     This is 1 of 228 approved meteorites from New Mexico, United States (plus 2 unapproved names) (plus 1 impact crater)
     This is 1 of 1924 approved meteorites from United States (plus 867 unapproved names) (plus 28 impact craters)
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