Sample No.: ALHA80110

Location: Allan Hills

Field No.: 1062

Weight (gms): 167.6

Meteorite Type: L6 Chondrite

Physical Description: Roberta Score

Only a small patch of weathered fusion crust remains on the exterior of-this specimen. The interior is relatively fresh with metal obvious. A 2 mm discontinuous weathering rind is dark gray in color. This is in contrast to the whitish-gray interior material. ALHA80110 is probably a fragment from ALHA80101. Dimensions: 7 x 5.5 x 3 cm.

Petrographic Description: Brian Mason

Microscopic and microprobe examination has confirmed that ALHA80110, 80112, and 80115 are fragments of a single meteorite, along with ALHA80101, 80103, 80105, and ALHA80113, 80114, 80116, and 80125 are so similar that they can be included with a reasonable degree of certainty. In all of them chondrules are sparse and poorly defined, tending to merge with the granular ground-mass, which consists largely of olivine and pyroxene, with minor amounts of plagioclase, troilite and nickel-iron. A moderate amount of limonitic staining is present around the nickel-iron grains. Microprobe analyses gave the following mineral compositions: olivine, Fa₂₄; orthopyroxene, Fs₂₀; plagioclase, An_10-11; grains of merrillite were analyzed in ALHA80110, 80115, 80125. These specimens are all L6 chondrites.  The sections of ALHA80115, 80116, and 80125 have thin (0.1-0.2 mm) veinlets consisting largely of brown isotropic material (possibly ringwoodite and majorite); plagioclase near these veinlets is partly converted to maskelynite, with CaO content (2.0-2.2%) appropriate to oligoclase composition, but with deficient and variable Na₂O content.