Thin full slice. Weight 4.0 grams >>>>>>>>>>>>>>>>>>>>>>>>>>>>> Northwest Africa 13571 (NWA 13571) Morocco Purchased: 2013 Classification: HED achondrite (Eucrite, melt breccia) History: Sergey Vasiliev and Marc Jost (SJS) purchased the 61.1 g specimen from a Mohammed Sbai in Ouzarzazate, Morocco, in April 2013. Physical characteristics: Sample is an ovoid-shaped fragment. The exterior is partially coated with a greenish-orange rind that may be where the impact melt vein is exposed on the surface. The cut face of the sample shows a dark interior with an impact melt brecciated structure. Petrography: Sample shows breccia in breccia structure composed of angular to rounded clasts set within an opaque melt matrix. Clasts have brecciated textures composed of basaltic textured clasts set within a comminuted matrix crosscut by 2 mm thick opaque impact melt veins. Lithic fragments have subophitic textures with exsolved pyroxenes. Additional minerals are Si polymorph, chromite, ilmenite and apatite. Geochemistry: (A. Love, App) low-Ca pyroxene, Fs61.5±0.6Wo2.7±0.8 (Mg#36.7±0.4, Fe/Mn=30.0±1.1, n=25); pigeonite, Fs55.9±4.1Wo11.0±3.4 (Fe/Mn=30.2±0.3, n=2); high-Ca pyroxene, Fs27.7±3.5Wo42.3±4.1 (Fe/Mn=30.2±0.8, n=17); plagioclase, An88.8±2.2Or0.4±0.2 (n=24). Classification: HED achondrite (eucrite impact melt breccia). Based on textures and mineral compositions, sample is a basaltic eucrite impact melt breccia. Specimens: Sergey Vasiliev and Marc Jost (SJS) hold the main mass. A type sample of composed of a slice and end cut weighing 12.23 g and a polished thin section are on deposit at App. Place of purchase: Ouzarzazate, Morocco Date: P 2013 Mass (g): 61.1 Pieces: 1 Class: Eucrite-melt breccia Shock stage: M-S5 Weathering grade: low Ferrosilite (mol%): 61.5±0.6; 55.9±4.1; 27.7±3.5 Wollastonite (mol%): 2.7±0.8; 11.0±3.4; 42.3±4.1 Magnetic suscept.: 2.77 Classifier: A. Love, App Type spec mass (g): 12.23 Type spec location: App Main mass: Sergey Vasiliev and Marc Jost (SJS)