Sample No.: CMS 04061-04079 Location: Cumulus Hills Field No.: 14682; 14627; 14639; 14614; 14076; 14611; 14608; 14688; 14698; 14660; 14669; 14693; 14663; 14604; 14647; 14609; 14619; 14606; 14664 Dimensions (cm):   23.0x17.0x10.0; 18.0x17.5x21.0; 19.0x12.0x16.0; 37.5x19.5x15.0; 15.0x13.5x12.5; 16.5x11.5x9.5; 10.5x20.0x14.0; 41.0x24.0x13.0; 40.0x36.0x19.5; 16.0x9.0x10.0; 13.0x9.0x8.0; 15.5x7.5x9.5; 12.0x8.0x10.0; 10.0x4.5x5.0; 2.0x2.0x1.0; 2.5x1.5x1.5; 20.0x15.5x10.0; 17.5x14.5x9.5; 19.5x14.5x15.0 Weight (g): 8465.0; 15315.0; 6188.3; 19195.0; 5738.0; 5877.0; 7561.9; 20425.0; 44700.0; 3515.8; 2110.1; 2312.9; 928.2; 325.7; 9.592; 8.252; 9625.0; 5695.2; 12550.0 Meteorite Type: Pallasite

   

Macroscopic Description: Tim McCoy and Linda Welzenbach
These meteorites are pallasites with common exterior morphology and weathering. They range in mass from 8.2 g to 44.7 kg. They all exhibit a very weathered, rusty exterior with extensive removal of olivine, leaving voids that range in size from a few millimeters to many centimeters. The larger cavities probably resulted from extensive olivine removal during physical and chemical weathering and weathering of any residual metallic matrix.

Thin Section (,4) Description: Tim McCoy

Reflected Light

CMS 04071 was selected for examination. This mass is typical of the group in exterior morphology and weathering and of moderate size (2.11 kg). Two slices were cut from the center of the mass, each measuring ~9 cm by 6 cm. These slices exhibit fragmental, angular olivine grains ranging in size from a hundred microns to 2 cm in size. Olivine grains exhibit extensive iron oxide staining, producing olivine grains that range from brown near the margins of the slice to green in the interior. Interstitial to these grains are euhedral and irregular chromites, as well as troilite and schreibersite. Olivine is Fa₁₂ and the texture, mineralogy and even degree of weathering are reminiscent of Imilac. The meteorites are pallasites, probably members of the main group.