Northwest Africa 1906
R4
Found 2003
Morocco

A 560 g stone was purchased in Rissani in June 2003.

Classification and mineralogy ( T. Bunch and J. Wittke , NAU ): well-defined chondrule outlines with mostly recrystallized matrix and chondrule mesostasis. Olivine, Fa 39.4 ; augite, Fs 11 Wo 46.5 ; plagioclase, An 11 Or 5 ; chromite, Cr/(Cr+Fe) = 86, Mg/(Mg+Fe) = 12; pentlandite, Cr = 2.88 wt. % and merrillite. Shock level, S2, weathering grade, W2.

R chondrites, formerly known as Carlisle Lakes type meteorites, are named after the Rumuruti meteorite that fell in Kenya , Africa , in 1934 after it was further studied and ultimately reclassified.

R chondrites are highly oxidized and contain high amounts of iron-rich olivine and iron sulfides and fewer chondrules than ordinary chondrites. They often contain xenolithic inclusions and high amounts of noble gases that suggest they are a regolith from the surface of an asteroid. The parent body of the R chondrites is unknown.

Click on images below to enlarge

---

Northwest Africa 1906  R4 Chondrite
71.3 gram endcut
$1500.00

For ordering information please click HERE