The South Pole‐Aitken Basin: Constraints on Impact Excavation, Melt, and Ejecta

The South Pole‐Aitken Basin: Constraints on Impact Excavation, Melt, and Ejecta Citron, RI; Smith, DE; Stewart, ST; Hood, LL; Zuber, MT The formation and evolution of the South Pole‐Aitken (SPA) basin is critical to relating large impact basin formation and modification to lunar geophysical evolution. Most prior models of the SPA impact were conducted in 2D, making it difficult to compare model output to the 3D crustal structure and ejecta distribution. In order to better constrain the parameter