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.
Rift valleys differ from river or glacial valleys in that they are created by tectonic activity rather than surface climatic forces.They are often narrow with flat floors and steep walls, and most of them occur in oceanic crust. Two major rift valleys occur on the land surface, or in the continental crust: the Baikal Rift Valley in Siberia and the African Rift. Formation We've established that rift valleys are formed due to a splitting in the earth's crust.