Grinding (rubbing) noise from the front-Motorcycle Forum. Gear grinding. By Jonger in forum Marauder M50 Secret Hideaway Replies: 9 Last Post: 07-11-2006, 02:55 PM. Lubing ...
Fault-Block Mountains: The Fault-block Mountains or block mountains are created when faults or cracks in the Earth's crust force materials or blocks of rocks upward or down. The uplifted blocks are Block Mountains or horsts. The intervening dropped blocks are called graben, which can be small or form rift valley systems. These block mountains break up into chunks or blocks and move either up or down. When they move apart blocks of rock get stacked on one another Fault-block Mountains usually have a steep front side and then a sloping back side.
As the plates separate along the boundary, the block between the faults cracks and drops down into the soft, plastic interior (the asthenosphere). The sinking of the block forms a central valley called a rift. Magma (liquid rock) seeps upward to fill the cracks. In this way, new crust is formed along the boundary.Earthquakes occur along the faults, and volcanoes form where the magma reaches the surface. Where a divergent boundary crosses the land, the rift valleys which form are typically 30 to 50 kilometers wide.Examples include th e East Africa rift in Kenya and Ethiopia, and the Rio Grande rift in New Mexico.here a divergent boundary crosses the land, the rift valleys which form are typically 30 to 50 kilometers wide. Examples include th e East Africa rift in Kenya and Ethiopia, and the Rio Grande rift in New Mexico.