Image: Mud Volcano in Gobustan 01

Description: The mud volcanoes of Azerbaijan are one of the strangest things I have seen. The oil under the surface reacts with the soil and reaches the surface in the form of cold grey bubbling mud that ends up forming a small volcano. The mud is safe to touch as it is cold and meant to be good for the skin. However, when the pressure builds up, those volcanoes can erupt, sometimes quite violently.
Title: Mud Volcano in Gobustan 01
Credit: originally posted to Flickr as Mud Volcano near Gobustan, Azerbaijan
Author: Bruno Girin
Permission: This image, which was originally posted to Flickr.com, was uploaded to Commons using Flickr upload bot on 01:58, 21 May 2008 (UTC) by Kimse (talk). On that date, it was available under the license indicated. This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one. http://creativecommons.org/licenses/by-sa/2.0 CC BY-SA 2.0 Creative Commons Attribution-Share Alike 2.0 truetrue
Usage Terms: Creative Commons Attribution-Share Alike 2.0
License: CC BY-SA 2.0
License Link: http://creativecommons.org/licenses/by-sa/2.0
Attribution Required?: Yes