The achondrites Elephant Moraine A79004 and A79011 are closely related polymict eucrites of a type previously unrecognized in Antarctica. They contain an early, metamorphically homogenized breccia containing clasts of great textural diversity very similar to those in howardites, and a late injected mafic clast component that contains a suite of basalts that may, in part, be the result of impact melting rather than internal igneous processes. The basaltic achondrite parent body (BAP), of which they are regolith samples, had a complex igneous history of (1) early igneous activity, (2) brecciation to form polymict breccias, (3) localized metamorphism resulting in partial homogenization of areas of the regolith, (4) late igneous activity resulting from internal igneous or impact melting processes, and (5) further brecciation and mixing of late formed mafic rocks with early breccias.