Sample No.: EETA79005

Location: Elephant Moraine

Field No.: 1046

Weight (gms): 450.9

Meteorite Type: Polymict Eucrite

Physical Description: Roberta Score

One surface of this achondrite is concave while the rest of the meteorite is convex. Fusion crust is visible only on one surface and it is very shiny and polygonally fractured. The matrix is medium gray in color and is speckled with light and dark clasts; the largest being 3 mm in diameter. Vugs are apparent all over the sample. Chipping a corner off the meteorite revealed one fine-grained black clast ~0.5 cm in diameter. The color of the interior matrix is considerably lighter gray in color than the exterior. Dimensions: 10.5 x 8 x 7 cm.

Petrographic Description: Arch Reid

The meteorite is a fine breccia of pyroxene and feldspar fragments with also a large number of small lithic clasts. The matrix is very fine grained; individual mineral fragments range up to 1.2 mm. Larger mineral fragments show evidence of deformation and some pyroxene grains show exsolution. Clast types include: 1) small dark aphanitic clasts, up to .7 mm; 2) fine grained eucrite fragments up to 1 mm, the most common clast type, and; 3) recrystallized eucrite, one clast 2.1 mm. There are also a few small fragments of brown devitrified glass. The pyroxenes analysed are all pigeonites, Wo7En59Fs34 to Wo14En35Fs52, with a range of Ca contents and Mg/Fe ratios. Feldspars range from Or.1Ab4An96to Or.7Ab16An83. No very high Mg pyroxenes were found and the meteorite is a polymict eucrite or a howardite.