At Salissig we have a so-called “kettle hole”
Dead-ice is a lump of ice that has fallen of the large mass of ice, and then the lump of ice is just melting. Since the lumps of ice could be very big – several hundred meters on each side (some were of course smaller) – it could take a long time before they had completely melted away. It was extra slow at Mols, because of the amounts of sand and gravel, which laid on top of the ice like an isolating duvet. It took many years for some of the lumps of ice to melt – even thousands of years! While they melted, the gravel on top sagged and formed a hole in the landscape. Often there was still a bit of freshwater left from the ice, from the groundwater, and from the rainwater.
Kettle holes often have water at the bottom in the shape of a bog or a lake. These lakes differ from typical lakes because there is no supply of water from streams, brooks, or springs. For the same reason, the water is acidic, it has a high pH value, which means that the plants and animals that live in the kettle hole are highly specialised for this particular environment. If we drain the kettle holes and make them into farmland, we lose the species that are attached to this habitat.
B: 56.23181° L: 10.57573° (Seen from above)
B: 56.231° L: 10.57667° (The kettle hole)