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.
7.1 The 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.
Regolith is the material that lies on top of bedrock and is unconsolidated and rest on top of bedrock bedrock and sediments are stable whereas regolith is not
7.2 In Figure 7.2, if A is one unit area, how many unit areas are in B? In C? In D?
B,6 c 12 d 48
7.5 Less 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.
The most reasonable explanation is that the weathering from the sun effects the east side of the ridge from the afternoon sun on the morning frost.
7.6 What is the singular difference (apparent in Figures 7.10 and 7.11) in the chemical composition of common clay and kaolinite?
Kaolinite is more refined clay due to the increased rain fall and increase hydrolysis of orthoclase which is more through and is converted from feldspar
7.10 Rocks 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?
When water combines with hematite it limonite forms creating