Sample No. LEW88180

Location: Lewis Cliff

Dimensions (cm): 3.8 x 2 x 1

Field Number: 5171

Weight (g): 46.5

Meteorite Type: E6 chondrite

Macroscopic Description: Cecilia Satterwhite

This smooth and rounded meteorite is covered with brown weathered fusion crust. A large deposit of evaporite minerals covers some of the fusion crust. The interior is composed of fine-grained blue-black matrix. Oxidation is moderate but evaporite deposit is abundant in the interior.

Thin Section (,2) Description: Brian Mason

Chondrules and chondrule fragments are barely recognizable, the section consisting largely of enstatite in prisms up to 0.3 mm long; the section also shows a considerable amount (~25%) of nickel-iron and minor amounts of sulfides and plagioclase. The meteorite appears to be unweathered. Microprobe analyses show that most of the enstatite is almost pure MgSiO3, with FeO less than 0.3%, but rare grains with FeO up to 9.2% were measured. One grain of plagioclase was analysed; it is almost pure albite, with CaO 0.5%, K2O 1.1%. The nickel-iron contains 2.4% Si. Rare grains of a silica polymorph, tridymite or cristobalite, were detected. The meteorite is an enstatite chondrite, classified E6.