mountain building powerpoint

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process of mountai building

Transcript of mountain building powerpoint

It is not the mountain we conquer but ourselves.” Edmund Hillary quotes (New Zealander mountain climber and Antarctic Explorer Famous for being first to succesfully climb Mount Everest b.1919)The experienced mountain climber is not intimidated by a mountain -- he is inspired by it. The persistent winner is not discouraged by a problem -- he is challenged by it. Mountains are created to be conquered; adversities are designed to be defeated; problems are sent to be solved. It is better to master one mountain than a thousand foothills.

Green Mountain

                                                                                                           

 Green Mountain

  You ask me why I live on Green Mountain ?  I smile in silence and the quiet mind.  Peach petals blow on mountain streams  To earths and skies beyond Humankind.  Translated by: A. S. Kline's

A Mountain Revelry

                                                                                                                                                                               

                        

 

To wash and rinse our souls of their age-old sorrows,We drained a hundred jugs of wine.A splendid night it was . . . .In the clear moonlight we were loath to go to bed,But at last drunkenness overtook us;And we laid ourselves down on the empty mountain,The earth for pillow, and the great heaven for coverlet. Translated by: Shigeyoshi Obata

Mountains sometimes form when many layers of the Earth's crust are moved vertically upward at fault lines by pressures caused by plates colliding. Fault lines are great cracks in the crust. The mountains that are formed in this way are called fault-block mountains.

The Sierra Nevada mountains in California and Nevada, and the Grand Teton range of Wyoming are examples of fault-block mountains.

There are five ways that mountains are formed

Volcanic activity

Folding

Faulting

Dome building

Erosion

is a process in which the Earth's plates are pushed together in a roller coaster like series of high points and low points. Folding bends many layers of rocks without breaking them.

The Appalachian Mountains and Rocky Mountains of the United States, and the Alps of Europe are examples of mountain ranges that were formed by folding

These are called Dome Mountains. Dome mountains are much higher in elevation than the surrounding land and because of this erosion occurs at a very fast rate.

Adirondack Mountains of New York are low mountains that were formed when the crust was heaved upward without folding or faulting into a rounded dome.

Mountains are built through a general process called "deformation" of the crust of the Earth. Deformation is a fancy word which could also mean "folding".

The lithospheric slab subducted, while the force of the collision gradually causes the slab to fold deeply. Along the way, melting of the subducted slab leads to volcano formation.

Three Types of Faults

A fault is a fracture in the Earth's crust along which motion may occur. It marks the boundary between two plates. There

are three main types of faults.

NORMAL

In normal faulting, the hanging wall block moves down relative to the footwall block. The fault plane usually makes a high angle with the surface (> 45 degrees). Normal faults are associated with crustal tension.

                                                                                                                            

Reverse FaultIn reverse faulting, the hanging wall block moves up relative to the footwall block. The fault plane usually makes a low angle with the surface (< 45 degrees). Reverse faults are associated with crustal compression and are also known as thrust faults.                                                                                                                              

Strike-slip FaultIn strike-slip faulting, the two blocks move either to the left (sinistral ) or to the right (dextral) relative to one another. Strike-slip faults are associated with crustal shear and are also known as wrench faults.