Sample No.:	LAP 03721; LAP 03722; LAP 031109
Location:	LaPaz Ice Field
Field No.:	16503; 16770; 16890
Dimensions (cm):	4.5x3.5x3.0; 3.5x2.5x2.5; 2.1x1.5x1.2
Weight (g):	87.495; 29.550; 14.5
Meteorite Type:	Ureilite

Macroscopic Description: Kathleen McBride and Cecilia Satterwhite
The exteriors have dark brown fusion crust exhibiting polygonal fractures and a few iridescent halos. Areas lacking fusion crust reveal a weathered brown interior. The interiors are hard but friable and revealed a dark gray matrix. Shiny grains with no apparent cleavage planes and translucent minerals with a slight yellow tint and opaque white to light gray grains are visible.

Thin Section (,2) Description: Valerie Reynolds, Tim McCoy and Linda Welzenbach
These sections are similar and almost certainly paired with LAP 03587, which was described as follows: The section consists of an aggregate of large olivine and pyroxene grains up to 2 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. Shock effects in olivine are minor; pyroxenes exhibit mosaicism. Olivine has cores of Fa₂₅, and rims of Fa₁₀. Pigeonite is Fs_14-20,Wo_8-10. The meteorite is a ureilite.

Thin Section Images

Cross-Polarized Light LAP 03721	Plane-Polarized Light LAP 03721	Cross-Polarized Light LAP 03722	Plane-Polarized Light LAP 03722

Cross-Polarized Light LAP 03722	Cross-Polarized Light LAP 031109	Plane-Polarized Light LAP 031109

Lab Images