Macroscopic Description: Kathleen McBride
75% of the exterior has a shiny, black fusion crust. The bottom portion of the rock shows polygonal fractures. The exposed interior has weathered to a greenish-brown color. The interior is a gray matrix with white to light gray clasts 1-3 mm in length. Black clasts < 1 mm. This meteorite is moderately hard, with metal grains. Some rusty and oxidized areas are present.

Thin Section (,4) Description: Tim McCoy, Linda Welzenbach
The section consists of relatively few chondrules (up to 1 mm) and chondrule fragments in a fine-grained brecciated matrix, with very abundant iron sulfide and pentlandite and lesser abundances of oxides and graphite. Mineral compositions are olivine of Fa_27-46 (most Fa_38-40), orthopyroxene of Fs_18-36Wo_1-3 and augite Fs_9-15Wo_44-48. The olivine composition is similar to R chondrites, although graphite has not been previously reported in this group.

Oxygen Isotope Analysis: T.K. Mayeda and R.N. Clayton
Our analysis for LAP 02238 gives: δ ¹⁸ O = +3.5 and δ ¹⁷ O = +4.5. This gives Δ ¹⁷ of +2.7, in the range of R-chondrites, consistent with the very iron-rich olivine. The δ values are a little lower than the previous values seen in R chondrites (Y-75302).

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