Sunday pokatushki.

In general, today decided with friends to make a sortie on the nature, to go to the mud volcanoes are not far from our city of Kerch, on the east coast of the Crimea, spread a small photo:
Will 17 ph.
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In Crimea, the most significant cluster of volcanoes located on the Kerch peninsula, 8 km north of the village of Kerch Bondarenkovo (b. Bulganak). Crimean Tatar name associated with the word Bulganak Bulganak - dirty, muddy.
Beyond the village Bondarenkovo almost flat terrain is not deep desert basin with a diameter of about 400 m. Everywhere bare brownish-gray earth mounds with scattered conical shape. In the center of the basin matt gleaming circular lake filled with mud. This is Bulganakskoe field with the largest in the Crimea a group of seven mud volcanoes.
Appearance of mud volcanoes is quite diverse. Some have a wide crater (up to 15 - 20 m) and filled to the brim with thick mud. External gentle slopes, and from a distance looks like a volcano lake, slightly elevated above the surrounding terrain. From time to time the dirt is blown up, and the gas bubbles emerging from the noise burst. Gas composition complicated installed therein methane, nitrogen and carbon dioxide. The level of dirt in the crater varies. Sometimes he is so increased that the dough is poured over the edge, and the steep slope of the external flows several broad streams, and even over the entire surface. Podsyhaya, light gray and dark places of dirt gets a brownish hue.
The quiet operation of the mud volcano is sometimes replaced by stormy. Then out of the crater emitted a powerful fountain of mud up to 10 - 20 m, pour a thick layer of viscous liquid slope of the hill. A layer of mud dries and cracks quickly, covered with white mineral efflorescence. Cracked mud at first glance gives the impression of a durable and reliable pounds. But this first impression is deceptive: it under the solid crust is viscous mud. Therefore, no matter how great the desire to approach the edge of the crater, in any case, do not do it. Already more than once mud sucking abyss of cows, goats and other domestic animals. And during World War II German tank decided to shorten the route and went straight through the "puddle." Combat vehicles were not able to save, and it quickly sucked mud volcano.
But Bulganakskoe depression are more common mud volcanoes correct conical shape, height from half a meter to a few meters. In form they are very similar to the real stratovolcanoes and act on the ground as they model. Cone mud volcano completes the small crater filled with dirt. With short intervals, usually in a few minutes, there are small bubbles of gas and noise burst and mud flows over the crater and flows down the steep slope. Sometimes it breaks the surface of the dirt on the side of the volcano, simulating the parasitic cone of the volcano.
infa from here:
www.krim.biz.ua/geologija_bulganak.html