Weathering of the Lithosphere

We will discuss the “external” processes that are shaping the landscape. The wearing away of rock and surface features involve three basic types of activities: weathering, mass wasting and erosion (collectively called “denudation “). This module covers these processes. First, the disintegration of rock material (“weathering”) is discussed. Second, the short distance, down-slope movement of weathered rock (“mass wasting”) is examined. And third the transportation of weathered rock substantial distances where is deposited.

Also in this module, you should note the basic difference between the processes of “mechanical” and “chemical” weathering, as well as the importance of joints and other kinds of rock openings to weathering. While there are many different types of mass wasting, all forms of mass wasting are put into just four categories, based on similarities in the dominant processes involved. You should also note the varying roles of water in both weathering and mass wasting.

The work of running water is the most important external process shaping the landscape. This Module introduces the fundamental principles of these “fluvial processes” and “glacial processes”.

M7D1: Chemical Weathering

What would be some examples of rock that would undergo chemical weathering in the mid-latitudes? What effects of this type of weathering have you seen? Is there anything that can be done to reduce it that would mitigate its impact on human society

Your initial post should be at least 250 words and must substantively integrate the assigned readings from the module with proper APA style formatting// You may use additional sources and materials as long as they are relevant to the discussion and cited properly.

M7D2: River Deltas

What differences exist between rivers with deltas and those without? What potential impact does the existence of deltas have on the human population in the U.S.?

Your initial post should be at least 250 words and must substantively integrate the assigned readings from the module with proper APA style formatting// You may use additional sources and materials as long as they are relevant to the discussion and cited properly.

M7D3: Sea Ice and Glacial Ice

Give some examples of what is happening to sea ice and glacial ice. Why is this occurring? What are the possible human impacts and vice versa?

Your initial post should be at least 250 words and must substantively integrate the assigned readings from the module with proper APA style formatting// You may use additional sources and materials as long as they are relevant to the discussion and cited properly.

 

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