 Command Module Pilot Alfred Worden remained in orbit and acquired hundreds of high-resolution photographs of Mare Imbrium (and other regions of the moon) as well as other types of scientific data.The crew on the surface explored the area using the first lunar rover and returned to Earth with of lunar surface material.Samples were collected from Mons Hadley Delta, believed to be a fault block of pre-Imbrian (Nectarian or Pre-Nectarian) lunar crust, including the "Genesis Rock."