UGA GEOG 1101 - Geography Lectures Test 3 (18 pages)

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Geography Lectures Test 3



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Geography Lectures Test 3

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Pages:
18
School:
University of Georgia
Course:
Geog 1101 - Human Geography
Human Geography Documents

Unformatted text preview:

Geography Lectures 22 26 Introduction to Geomorphology Definition The science of landforms their origin evolution form and spatial distribution The development and changes on the earth s surface over time Basic Terms Landform individual element of a landscape EX a mountain a river a hill etc Topography Earth s ridges valley s other surface features the change in elevation over the Earth s surface Uniformitarianism The theory that geologic events and others are caused by natural processes many of which are operating at the present time and that the processes we see today operate in the same way today as they did in the past EX the way a volcano operates today is the same as it did 1000 yrs ago or 1million years ago or 1 billion years ago Types of Landforms Tectonic developed by the rearrangement of the Earth s crust driven by internal energy Fluvial those developed by moving liquid water Glacial those developed by glacial ice solid water Coastal those developed by waves Eolian those developed by wind Landforms and systems change but tend to be in some form of an equilibrium state when viewed over geologic time Steady state little change with inputs and outputs equal Dynamic Equilibrium fluctuates around an average value but demonstrates a trend over time Geomorphic Processes relationship between external and internal processes and forces Internal Processes those processes which occur or originate within Earth s crust volcanism diastrophism mountain building plate tectonics massive crustal rearrangements External Processes those processes which occur on the Earth s surface weathering erosion by fluvial glacial eolian coastal EARTH S INTERNAL STRUCTURE Characteristics arranged in concentric layers heavier elements towards the center each layer distinct in chemical composition or temperature Result of cooling since formation of the earth some 4 6 billion years before present BYBP How do we know only by indirect evidence Seismic waves By analyzing the behavior of seismic



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