0 Members and 1 Guest are viewing this topic.
My guess is also volcanic. There is a distinct lava flow south of the small crater that is located east of the two big craters. There also appears to be a lava flow to the south of the large southern crater. The northern crater has distinct collapse ring structures around the outside and resurgent lava domes in the middle. Lava from the northern crater may have flowed into and partially filled the southern crater. According to several articles, that area of Nei Mongol has had fairly recent (geologically speaking) volcanic activity.