Water that seeps out of the top of the tank is particularly ominous. If you fear a leak as soon as you begin to use your new gas heater, donât panic. The first time a gas heater starts up, it will produce condensation. That is the reason for the dripping sound, and perhaps a tiny puddle.
Rift valleys can be very deep, and both such valleys known to exist in continental areas on Earth, the East African Rift and the Siberian Baikal Rift, have large, deep lakes in them. As the walls of a rift valley are pulled apart, the floor of the valley tends to sink. If this subsidence happens faster than erosion from the walls can fill it in with sediment, the floor of the valley continues to fall relative to the surrounding terrain.
The most well-known rift valley on Earth is probably the so-called Great Rift Valley System which stretches from the Middle East in the north to Mozambique in the south. The area is geologically active, and features volcanoes, hot springs, geysers, and frequent earthquakes.