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.
What is a Rift Valley Landform? A rift valley is a valley or depression in the land bordered by fault zones and separating tectonic plates. The depressed areas of a rift valley are formed by one or more grabens. A graben is a fallen portion of land with faults on 2 or more sides. When outer landmasses move away from the fault zones, the land in the middle can slowly drop during a period of thousands of years.