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GLG/101 Version 4 Weathering Worksheet -1

Question # 00040514
Subject: Geology
Due on: 07/31/2015
Posted On: 01/05/2015 10:21 AM

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Associate Level Material

Weathering Worksheet

Answer the lab questions for this week and summarize the lab experience using this form.

Carefully read Ch. 7 of Geoscience Laboratory.

Complete this week’s lab by filling in your responses to the questions from Geoscience Laboratory. Although you are only required to respond to the questions in this worksheet, you are encouraged to answer others from the text on your own.

Questions and charts are from Geoscience Laboratory, 5th ed. (p. 117-130), by T. Freeman, 2009, New York, NY: John Wiley & Sons. Reprinted with permission.

Lab Questions:

7.1The nature of the boundary with bedrock serves to distinguish regolith from sediments. Describe the difference in the boundaries between (A) bedrock and regolith, and (B) bedrock and sediments, in Figure 7.1.

7.2In Figure 7.2, if A is one unit area, how many unit areas are in B? In C? In D?

7.5Less obvious is the greater degree of weathering that might e apparent on the east sides of north-south highways (Fig. 7.8). What is the reasonable explanation for that? Hint: A clue is imbedded in Figure 7.8.

7.6 What is the singular difference (apparent in Figures 7.10 and 7.11) in the chemical composition of common clay and kaolinite?

7.10Rocks in fresh roadcuts are commonly gray to brown in color, but after a few decades reds and yellows begin to appear. Why? Hint: What elements in the atmosphere and surface water are at work here?

7.19Agitation (as in shaking) liberates CO2 from soda pop. So what one or two actions of cave water do you think might be accompanied by agitation of the water? Hint: We’re looking for a simple cause of turbulence…as in the case of rain water.

7.22Ref. Figure 7.24. Why the patchy occurrences of high rainfall in the northwest? Hint: Look again at the caption to Figure 7.23.

7.24Relative to the map feature asked for in Q7.23, where, in broad map terms, is the more fertile soil in Fayette County (NW, NE, SW, SE of the map feature)?

7.28After 30 years of development, (A) which horizon was the thickest? (B) Which horizon was yet to develop


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GLG/101 Version 4 Weathering Worksheet -1

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glg101r4_Week_6_Weathering_Worksheet_SOLU.doc (33.5 KB)
Preview: are xx work xxxx Iron (Fe) xxxxxxx in fresh xxxxx reacts xxxx xxxxxxxxxxx oxygen xxx forms Hematite xxxx compound is xx reddish xxxxxx xx cut xxxxxxxx of the xxxxx initially turn xxxx reddish xxxxx xxxx further xxx Hematite reacts xxxx water it xxxxx Limonite xxxx xxxxxxxx is xxxxxxxxx in appearance xx we find xxxx after xxx xxxxxxx reds xxx yellows begin xx appear on xxx surfaces xx xxxxx 7 xx Agitation (as xx shaking) liberates xxx from xxxx xxx So xxxx one or xxx actions of xxxx water xx xxx think xxxxx be accompanied xx agitation of xxx water xxxx xxxx looking xxx a simple xxxxx of turbulenceas xx the xxxx xx rain xxxxx Carbon dioxide xxxxxxxx with atmospheric xxxxxxxx to xxxx xxxxxxxx acid.....
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