Name: Mount Prestrud 95404 This is an OFFICIAL meteorite name. Abbreviation: PRE 95404 Observed fall: No Year found: 1995 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 39.5 g
Macroscopic Description: Kathleen McBride
Fifty percent of the exterior of this carbonaceous chondrite has dull brown/black fusion crust. It has a rough texture and polygonal fractures. The interior reveals a gray crystalline matrix with metal grains present. Light colored chondrules, mm sized, are visible in the interior.
Thin Section (,2) Description: Brian Mason
The sections shows numerous chondrules (up to 1.2 mm across), chondrule fragments, irregular aggregates, and silicate grains in a black matrix which contains a moderate amount of nickel-iron and sulfide. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-41; pyroxene, Fs7-21. The matrix consists largely of olivine, with composition around Fa30. The meteorite is tentatively classified as a C3 chondrite of the Vigarano subtype, but it lacks the marked olivine composition peak at Fa0-1 commonly present in C3 chondrites.