Sample No.: EETA79011

Location: Elephant Moraine

Field No.: 1040

Weight (gms): 86.4

Meteorite Type: Polymict Eucrite

Physical Description: Roberta Score

A patch of dull black fusion crust appears only on one surface. The rest of this achondrite is medium-gray in color. Several types of clasts are visible on the exterior with the largest one being ~0.7 cm in its longest dimension. The interior revealed through chipping is lighter gray in color than the exterior and contains many clasts. This achondrite looks similar to other eucrites already processed from 1979, 1978 and 1977 collection.

Petrographic Description: Arch Reid

The thin section shows a fine breccia with highly angular small monomineralic pyroxene and feldspar clasts predominating. Pyroxene grains range up to 2.5 mm with the large fragments showing evidence of deformation. Some single pyroxene fragments show exsolution textures. Among the small lithic clasts present are included: 1) fragments of brown devitrified glass, up to 1.6 mm; 2) fine grained eucrite clasts with granoblastic texture, up to .6 mm; 3) fine grained eucrite fragments, up to .7 mm and; 4) medium grained eucrite up to 1.6 mm. Pyroxenes have a range of compositions from Wo4En67Fs30 to Wo2En37Fs61. The more magnesian pyroxenes all have low Ca contents but the more Fe-rich varieties range from Wo2En37Fs61to Wo35En27Fs38. Feldspar ranges in composition from Or.2Ab7An93 to Or1.5Ab19An80. The meteorite is classified as a polymict eucrite or a howardite.