Sample No.: EET90001; 90002; 90003; 90025; 90026

Location: Elephant Moraine

Field Number: 6383; 6852; 6804; 6953; 6432

Dimensions (cm): 3.8 x 3.8 x 2.8; 3 x 2.8 x 1.5; 3.5 x 2.5 x 1.8; NA; 3.5 x 2.0 x 4.5

Weight (g): 53.2; 28.0; 30.8; 45.8; 61.5

Meteorite Type: C4 chondrite

Macroscopic Description: Robbie Marlow and Cecilia Satterwhite

Some fusion crust is present on all of these meteorites, the amount varying from 10% to 95%. The fusion crust is generally thin and black. Traces to abundant amounts of evaporite deposits are present. The deposit is white on most specimens except for 90003 where it has a greenish-blue color similar to that seen on EET90004 and 007. The interior of these Elephant Moraine C4's is medium gray. Cream-colored inclusions are present as is a small amount of metal.

Thin Section (EET90001,8; 90002,5: 90003,3; 90025,2; 90026,2) Description: Brian Mason

These sections are identical with the EET90004 group previously described (Antarctic Meteorite Newsletter, vol. 14, no. 2, 1991), and can confidently be paired with them. Additional specimens paired on optical examination are 90005, 006, 008, 009, 010, 013, 014, 016, 017, 023, 027, 028, 035, 036, 038, 039, 040, 041, 042, 043 [sic], 044, 045, 046, 047 [sic], 048, 049, 050, 052.

In the original description of the EET90004 group they were classed as C4 chondrites and tentatively paired with the EET 87507 group. Recently Kallemeyn et al. (Geochimica et Cosmochimica Acta, vol. 55, p. 883, 1991) reassigned EET87507 and its paired specimens from type 4 to type 5 "on the basis of their coarse silicate groundmass (50-200 µm) and highly recrystallized, barely discernable chondrules." However, well-defined chondrules are present in the following sections: EET87507,5; 87526,8; 90002,5; 90004,4; 90015,6; 90018,3; 90022,4. In fact, these sections are very similar to those of Karoonda, which is generally accepted as a C4 chondrite. Under these circumstances the original classification of these meteorites as C4 chondrites is retained.