<< off off topic >>. I apologize for both: not answering to you in time and littering the thread now. I don't feel it's appropriate to send you "unsolicited" e-mail. Partially Charles answered your question. Let me illustrate it with a scene from the real life. In the morning after two days storm, water surface of an inlet covered by dead fish. All population, standing in water up to waist, fill up their buckets, bags, boxes- whatever can be found. That is "bubbles" effect. But it was, it is and it will be this way. Human activity has nothing to do with it. The explanations given by Charles (or by the author of the article) are hard to agree with. First, the Black Sea is not the only almost " sea-lake" in the world. The shallow Baltic would suit to such definition much better. Then, there are Red Sea( which has some abnormalities, indeed) and even Persian Gulf hosting two big rivers. And what to say about the the Caspian Sea, which is a real lake filled with "sea water". It has almost 150 years long history of petroleum exploitation (Hundred years ago it was a battlefield for rights between Rockefeller and Nobel's- two Alfred's brothers. Rocky lost). Why such conditions don't exist in, for example, Baikal, with only one river (Angara) running out for a long way to Arctic? Second, I've never heard about dead tree trunks. North coast mostly forestless (steppe), East and South are mountainous . The rivers: Danube has a delta, Dnepr runs through rapids (so called "porogi" - thresholds)and can't deliver, Don and Kuban are steppe rivers. ( By the way, all rivers names are not of Slavic or Turkey languages origin . They are Celtic words). Caucasus rivers run east toward Caspian Sea. Ones, running West are rather creeks than rivers. Such abnormality of the Black Sea is either a "birth defect" or results of cracks in a sea bed in an active seismic zone. Human activity damaged that, one of a few Earth paradises, terribly. But, unfortunately, GRNO is unable to help. All above, of course, is just an opinion of an amateur. Eric N. |