11 For a more holistic view of mountains… So what exactly are the processes that take place to form these mountains?Dome mountainsMagma pushes up but doesn't actually crack through the surface, you can get a dome mountainWithout erupting onto the surface, magma pushes up overlaying rock layersCools and forms hardened rock as source moves awayUplifted area created by rising magma is called a domeOver long periods of time, erosion wipes away the outer layers of the mountain, exposing the dome-shaped cooled magma of harder rockFor a more holistic view of mountains…
12 For a more holistic view of mountains… So what exactly are the processes that take place to form these mountains?Plateau mountainsLarge flat areas pushed above sea level by forces within the Earth or formed by layers of lavaPlateau mountains are often found near folded mountainsAs years pass, streams and rivers erode valleys through the plateauFor a more holistic view of mountains…
13 So what exactly are the processes that take place to form these mountains? Volcanic mountainsSelf-explanatory!More details in the future lessons!
14 Mountain Building 3 stages accumulation of sediments rock deformation and crustal uplifta period of crustal uplift caused by isostatic rebound and block-faulting
15 Stage 2: Rock Deformation and Crustal Uplift Fold mountainsFold mountains are formed when two plates collide head onEdges of each tectonic plate crumple and buckleMonocline, syncline, anticline,
16 Stage 3: Crustal Uplift caused by Isostatic Rebound and Block-Faulting
17 Stage 3: Crustal Uplift caused by Isostatic Rebound and Block-Faulting Fault-block mountainsFaults named according to type of stress that acting on rock and nature of the movement of the rock blocks either side of the fault planeNormal (tensional)Reverse (compressional)Graben (tensional, subsidence)Horst (compressional, uplift)TransformWhat landform does faulting remind you of?