(M.E. Zucolotto and C.V.N. Villaça, UFRJ) Optical petrographic examination of a thin section shows a brecciated texture with many clasts set in a fine-grained matrix and a fusion crust ~50-200 μm thick. Some clasts contains both ophitic, subophitic texture and are surrounded by pulverized rocks of the same phase. Some clasts are separated by impact shock melt veins. The size of the plagioclase needles and pyroxene varies between the different clasts and exhibit about 700 μm in the coarse-grained clasts and less than 70 μm in the fine-grained clasts. All the different clasts are from the same compositional group, the sample has undergone extensive thermal equilibration with some larger low-Ca pyroxene grains showing coarse exsolution of augite which typifies type 5. Accessory minerals are silica, ilmenite, chromite, troilite, and Fe-metal (low Ni). Mineral grains show the effects of shock as undulatory extinction and mosaicism, some sparse melt pockets and impact melt veins but no maskelynite. Minor phases include ilmenite, with silica, iron sulfide, and Fe,Ni metal. Magnetic susceptibility (A.M.S Gomes and V.M.T.S Barthem, IF/UFRJ):