jurua
1. The Jurua river of Brazil as the center, east-west distance is about 2900 kilometers, and the south-north about 2900 kilometers too, craters overlap and the boundary is not regular.
巴西茹鲁埃纳河为中心,东西径约2900公里,南北径约2900公里,多坑复合,边界不规则;