Sample No.:	LAR 06870
Location:	Larkman Nunatak
Field No.:	19944
Dimensions (cm):	2.5 x 1.75 x 2.0
Weight (g):	15.43
Meteorite Type:	Eucrite (Brecciated)

Macroscopic Description: Kathleen McBride
95% black fusion crust covers the exterior, which is dull on one surface and shiny on the other. The interior is a gray and white matrix with a powdery texture.

 

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
The meteorite is a breccia that has been metamorphosed and shocked. Basaltic clasts measuring from 0.5-4 mm vary widely in texture and grain size (0.1-1 mm), reflecting their variable cooling histories, and boundaries between clasts and matrix have been largely obscured by later metamorphism. Pyroxenes are exsolved and pervasive shock effects include mosaicism in pyroxene. Mineral compositions are nearly homogeneous with orthopyroxene (Fs₆₀Wo₂), augite (Fs₃₀Wo₃₉), and plagioclase (An_78-86Or₁). The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a brecciated eucrite.

Thin Section Images

Plane-Polarized Light LAR 06870	Cross Polarized Light LAR 06870

Lab Images