Sample No.:	RBT 04255
Location:	Roberts Massif
Field No.:	16342
Dimensions (cm):	2.5 x 2.0 x 1.0
Weight (g):	10.170
Meteorite Type:	Achondrite Ungrouped

Macroscopic Description: Kathleen McBride
90% thick brown/black fusion crust covers the exterior surface. The interior is a rusty black matrix with metal and is hard.

 

Thin Section (,2) Description: Tim McCoy, Lauren LaCroix and Linda Welzenbach
The meteorite is paired with RBT 04239, which was described as follows: The section consists of an olivine-rich groundmass with pyroxene, plagioclase, metal and troilite present. Micron-sized metal-sulfide veinlets are abundant and a few relict chondrules are present. Olivine is Fa₂₄, orthopyroxene is Fs₂₀Wo₂, clinopyroxene is Fs₈Wo₄₄ and plagioclase is An₁₀Or₅. The meteorite may be an ungrouped primitive achondrite and has some similarities to the Divnoe meteorite (Petaev et al., Meteoritics, 29, 182).

Thin Section Images

Plane-Polarized Light RBT 04255	Cross Polarized Light RBT 04255

Lab Images