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Mass Movements and Human Responses

Concept of mass movements: Introduction (Note the word landslide is used instead of mass movement)  Physical Causes And Consequences Of Mass Movement from tudorgeog Kinds of mass movements: Soil creep, Solifluction, landslides, rock falls and mud flows, and slumps, and The impact of mass movements on people and the environment Soil Creep: Solifluction: Landslides:  … Read More »

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Slopes

Overview of South Africa’s topography. Types of slopes. Slope elements: crest, cliff (scarp slope, free face), talus (debris, scree slope) and pediment. Characteristics of the slope elements: crest, cliff, talus and pediment.   Slope development over time. The concept of slope retreat.

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Massive Igneous Rocks

Topography Associated with Massive Igneous Rocks: Batholiths, laccoliths, lopoliths, dykes and sills Batholiths Laccoliths Dykes Sills Characteristics and processes associated with the development of: Granite domes   Tors        

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Inclined/Tilted Rock Strata

Characteristics and processes associated with the development of: Scarp and Dip Slopes Cuesta Homoclinal ridge Hogsback Cuesta basin and Cuesta dome Utilization of these landscapes by people.

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Horizontally Layered Rocks

Characteristics and processes associated with the development of: Hilly landscapes   Basaltic plateaus Canyon landscapes and Karoo landscapes (mesa, butte and conical hill)  Karoo Journey from Joe Louw on Vimeo.   Conical Hill   Concept of scarp retreat or back wasting.   Utilization of these landscapes by people.

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Geomorphology

A – Horizontal Strata B – Inclined Strata C – Massive Igneous Rocks

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Plate tectonics

Plate tectonics is a theory explaining the structure of the earth’s crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle. An introductory video. (Plate Tectonics starts 1 minute in to the video) SOURCE: http://geology.com/pangea.htm Changes in the position of continents over time. Evidence for… Read More »

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2 Global air circulation

Global air circulation and resultant weather patterns 1. Primary air circulation Tri Cellular Arrangement    2.  Secondary Circulation The inter-tropical convergence zone (ITCZ)     Monsoons 

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