Geo 347 Climatic Geomorphology Test #1

Geo 347 Climatic Geomorphology Test #1

Six (6) of these questions will appear on the test and you will be asked to answer four (4) of them. The test will be available starting at 12:00AM on Friday, March 12th and your submission will be due at 11:59PM on the same date. You may use any sources you wish to prepare for the test, but everything should be answerable from the test, lectures, and in-class assignments. Answers should emphasize key concepts, processes, and make appropriate use of specific examples. Use diagrams and formulae in support of your prose. Diagrams and formulae must be labelled, with their terms explained, and they must be cited in your prose. For the test, you will be submitting typed answers. Scanned drawings and equations will be accepted.

So that your answers are concise and you don’t spend an inappropriate amount of time on the test, each typed answer must fit within the confines of four (4) pages (8.5*11 inches, one-inch margins, single-spaced text, Times New Roman font size 12) including equations, diagrams and references cited (Note: you do not need to cite lecture notes or out text book, Ritter et al). Diagrams are to be numbered with an explanatory caption and cited in the body of your text.

Questions:

1. Landform development may exhibit properties of either steady state equilibrium or dynamic equilibrium. Geomorphologists are also interested in the role of thresholds on landform development. Discuss what these terms mean in terms of the dynamics of:

a) a feature like Niagara Falls

b) a steep vegetated hillslope, and

c) a human-made feature such as a road built adjacent to a river or a hillslope

2. Explain how epeirogeny and orogeny are different. What are the major mechanisms responsible in each case? Give a minimum of two examples in each case that clearly illustrate the differences between these processes.

3.  Variations in annual denudation rates are better represented as a response to effective annual precipitation rather than total precipitation. Explain with the help of one or more diagrams what this means. Discuss why such representation tools  are really only effective on a regional extent.

4. What does it mean to state that an environment is weathering limited, as opposed to transport limited? Give an example of both of these diffusive properties of landform development, and describe how climate and land use influence them.

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