Examples of use of black lake
1. He has to fight a dreadful fire–breathing dragon, then he has to swim in the Black Lake under water for an hour, with slimy creatures trying to kill him, and finally he has to go through a massive maze which has roots that can twist round you and drag you under the huge hedges which close around you so you cant escape.
2. The clearest figure I can find for global reserves of recoverable oil comes from the Yemen Times, no doubt an impeccable source, which says that we had 34 cubic miles of it at the beginning of last year (equivalent, by my reckoning, to a sticky black lake the size of Greater London, 300 feet deep) and we are consuming it at the rate of one cubic mile per year, which means the lake will be dry before 2040.