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 Fa_25.5±0.4, Fe/Mn=52±3, n=4; orthopyroxene Fs_22.2±0.5Wo_1.5±0.1, Fe/Mn=31±2, n=5; clinopyroxene Fs_8.6Wo_44.9, Fe/Mn=25, n=1; plagioclase Or_11±3Ab_69±6An_21±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.