Gobustan mud volcanos

Azerbaijan sits on the Caspian oil fields. These mud volcanoes sit in the midst of an area with many oil seeps on to the surface. The volcanoes are probably gas and water bubbling to the surface.
The first pic looks across the field and the second shows how the mud builds up mounds. The rest of the pics look at the bubbling mud at several of the he mounds.もっと詳しく