Figure 6-12 RIVUXG A Partially Obliterated Crater on Venus This Magellan image shows how the right half of an old impact crater 20 mi (37 km) in diameter was erased by a fault in the crust. This crater lies in Beta Regio (see the left side of Figure 6-10). Most features on Venus are named for women in history and legend; this crater commemorates Emily Greene Balch, an American economist and sociologist who won the 1946 Nobel Peace Prize.