Sample No.: PCA91085; 91114; 91119; 91125;91238

Location: Pecora Escarpment

Dimensions (cm): 4.5 x 3.5 x 2.0; 1.5 x 2.8 x 1.6; 0.5 x 0.7 x 0.2; 1.5 x 1.2 x 1.0; 4.5 x 2.5 x 3.3

Weight (g): 79.6; 18.0; 0.3; 3.3; 96.2

Meteorite Type: E4 Chondrite

Macroscopic Description: Robbie Marlow and. Cecilia Satterwhite

The fusion crust present on these specimens range from 0 to 90%; is dark brown in color, and has large oxidation haloes. Chondrules have weathered out and are protruding from the surface of 91114. The interior matrices have weathered to a dark brown color. Abundant chondrules are present in all specimens. Evaporite deposits are present on interior and exterior surfaces of 91085, and 91238.

Thin Section (91085,2; 91114,2; 91119,2; 91125,2; 91238,2) Description: Brian Mason

These sections are so similar that a single description suffices. Chondrules are abundant, ranging up to 0.9 mm across; they consist of granular or fine-grained pyroxene. The groundmass consists largely of granular pyroxene, with lesser amounts of nickel-iron and sulfides, and a little feldspar and an SiO2 phase, probably cristobalite. Microprobe analyses show that the pyroxene is almost pure MgSiO3 (FeO up 1.7%, CaO up to 0.4%). The feldspar is almost pure albite (K2O up to 0.6%, CaO up to 0.7%). One grain of forsteritic olivine (FeO 1.6%) was analyzed in 91085. The nickel-iron contains 2.3-2.9% Si. The meteorites are classified as E4 chondrites; they are very similar to PCA82518, and the possibility of pairing should be considered. The following PCA 91XXX meteorites also belong to this pairing group: 91127, 91254, 91258, 91298, 91300, 91303.