Sample No.: EETA79004

Location: Elephant Moraine

Field No.: 1037

Weight (gms): 390.3

Meteorite Type: Eucrite

Physical Description: Roberta Score

Dimensions: 11 x 6.5 x 4 cm.  This oblong achondrite is covered with a thin dull fusion crust on all but two surfaces. The exterior matrix appears medium to dark gray in color and contains numerous clasts as large as 2 cm in diameter. Most of the larger clasts are dark in color though light colored clasts do exist. Vugs are apparent in this meteorite. Most are concentrated on surface in an area devoid of fusion crust. These vugs are as deep as 1 cm, as wide as 0.5 cm. The interior matrix is light gray in color with many inclusions. The one clast seen on the exterior extends 2.0x0.8 cm into the interior and appears to be easily plucked out. Many of the clasts in this achondrite will be easily plucked out. Several spots of severe oxidation are visible.

Petrographic Description: Arch Reid

Thin section shows a breccia dominantly made up of pyroxene and feldspar fragments in a fine-grained matrix. Much of the matrix is dark, fine-grained and may be recrystallized. The clasts are generally angular but some have less well-defined outlines and may have undergone reheating. Mineral fragments range up to 1.3 mm and comprise pyroxene (some showing exsolution), feldspar and less common opaques. Angular lithic clasts include fragments of very fine grained eucrite (2-5 mm), fine grained eucrite, and dark aphanitic material (1.6 mm). Pyroxene compositions show a range in Ca contents with little variation in Mg/Fe (Wo2En45Fs53 to Wo40En36Fs24 with low Ca compositions most abundant, in the few grains analysed). Feldspars analysed range from Or1Ab6An93 to Or1Ab14An85. The meteorite is classed as a eucrite.