Srīpur is a Martian impact crater, approximately 23 kilometers in diameter. According to a surface age map of Mars based on US Geological Survey data, the area around Srīpur is from the Noachian epoch, which places the area's age at 3.8 to 3.5 billion years ago. The crater floor is flat, except for a small craterlet toward east of the center, and is approximately 6,300 meters above zero altitude in elevation. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Mars large craters are named after deceased scientists, writers and others who have contributed to the lore of Mars. Small creaters (less than 60km) are named after small towns and villages.