Northwest Africa 2913
Morocco
Find: 2005
Achondrite (Eucrite, Monomict Melt Breccia)
History: A 100.2 g complete stone was purchased in Erfoud, Morocco, in May 2005.
Petrography: (J. Wittke and T. Bunch, NAU) Specimen contains medium-grained (<2 mm), centimeter-size, cumulate basalt clasts set in a microbreccia melt matrix. Clasts are moderately shocked with partial maskelynization of plagioclase and mechanical twinning, optical mosaicism and reduced birefringence in pyroxenes. The dark matrix is a flow mixture of FeO-rich glasses, very small cumulate basalt fragments, and patches of quench-textured microbasalt.
Geochemistry: Monomict cumulate basalt: host Ca-poor pyroxene (Fs55.4-57.8Wo5.1-2.9), FeO/MnO = 28; exsolved augite (Fs24.2Wo44.7), FeO/MnO = 36; plagioclase/ maskelynite (An90.8); chromite Cr/(Cr+Al) = 0.86.
Classification: Achondrite (eucrite, monomict melt breccia); moderate shock, minimal weathering.
Specimens: A 21 g type specimen is deposited at NAU.
Click on the links below to see more photos and prices.
WE BUY METEORITES and WE BUY FOSSILS! Please let us know if you have a meteorite or high quality fossil that you want to sell and we will let you know whether we would be interested in purchasing them from you. Thanks for visiting our site.
