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History: A single minimally weathered fusion-encrusted stone of 233 g was purchased from a
Moroccan dealer in Tagounite, Morocco, by M. Farmer in November 2005.

Petrography and Geochemistry: (J. Wittke and T. Bunch, NAU; A. Irving, UWS) The specimen
consists of a single yellow-green, relatively coarse-grained rock traversed by thin, black glass-
rich veins. It is an olivine-rich, two-pyroxene cumulate gabbro composed of olivine (Fa31.7;
FeO/ MnO = 96; 52 vol%), (Fs26.6Wo6.7; 23 vol%), augite (Fs16.2Wo29; 9 vol%), and
plagioclase (An56; 14 vol%) with minor amounts of Ba-K feldspar, chromite, ilmenite, and
merrillite. Larger pigeonite grains commonly enclose equant olivine grains, which contain
abundant melt inclusions (0.025–0.125 mm). Plagioclase is partially converted to maskelynite,
and pyroxenes and olivine exhibit shock lamellae and undulatory extinction. Note: This
specimen is identical in texture and mineral composition to the gabbro clasts in NWA 773 and
NWA 2700 and thus appears to be paired with those breccia specimens.

Classification: Achondrite (lunar, gabbro); minimal weathering.

Specimens: A 20.1 g type specimen and one polished thin section are on deposit at NAU. A
0.5 g specimen is on deposit at WUSL. An anonymous owner holds the main mass.
Meteorite Name
NWA 2977
Lunar, gabbro
Found 2005, North West Africa
Weathering &
Shock Level
Minimal weathering
Specimen Type
1 polished thin section, 1 covered thin section
NWA 2977 Lunar

Image nwa 2977 1
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