Presentation on theme: "I) Where Mountains Form A)Mountain Belts 1) Most Mountains are associated with convergent plate boundaries 2) Most mountains occur in long belts that."— Presentation transcript:
I) Where Mountains Form A)Mountain Belts 1) Most Mountains are associated with convergent plate boundaries 2) Most mountains occur in long belts that follow convergent boundaries 3) Himalayas lie along a current convergent boundary 4) Appalachians are in the middle of a plate – but were formed by converging plates over a billion years ago.
B) Continental Margins (land and sea meet) 1)Active Margins a) occur along plate boundaries b) mountain building takes place c) Himalayan Mountains 2) Passive Margins a) stable areas away from plate boundaries b) Appalachian Mountains
c) Passive margins provide the materials or sediments from which mountains form. Active Passive
IV) Mountain Building A)Major mountain systems are related to plate tectonics. Most mountains form along convergent boundaries Where else would you find mountains? Divergent Boundaries Hot Spots
V) Mountain Facts A) Himalayan Mountains 1) The largest/highest mountain range B) Mid-Atlantic Ridge 1) The longest mountain range
Factors that affect mountain Deformation Deformation – all changes that occur to a body of rock. 1.Temperature 2.Pressure 3.Rock Type 4.Time exposed to pressure or heat
Tectonic Forces Mountains are the result of rock that is permanently deformed by stress/forces Three types of forces cause three types of faults: Tension Compression Shear
Horsts & Grabens Large blocks of crust that rise due faulting on either side of the block. http://www.youtube.com/watch?v=5rmF4bY7 VMk&feature=relatedhttp://www.youtube.com/watch?v=5rmF4bY7 VMk&feature=related
4) Dome Mountains a)Individual, isolated structures that form in layers of sedimentary rock. b) There are two types of dome mountains: Plutonic Dome an igneous intrusion pushes up existing rock layers.
Tectonic Dome Tectonic Dome: Black Hills of South Dakota (Mt. Rushmore) Yosemite National Park uplifting forces arch rock layers into a dome
NormalReverseThrustStrike- Slip Type of Force Name of Boundary Type of Mountains Direction it is moving / illustration