Page 331 - Laboratory Manual in Physical Geology

4. What is the gradient (ft/mi) and sinuosity, from A to B on

FIGURE 11.4 , of the first order stream in Garvin Canyon?

(Refer to FIGURES 11.1 and 11.6 for help measuring

gradient and sinuosity.) Show your calculations. You will
graph this data later in the activity.
Gradient: ____________ft/mi Sinuosity: ____________
5. What is the stream order of the stream that occurs in

Timber Canyon ( FIGURE 11.4 ), and what is its gradient

(ft/mi) and sinuosity from C to D? (Refer to FIGURES
11.1 and 11.6 for help measuring gradient and sinuosity.)

Show your calculations. You will graph this data later
in the activity.
Stream order: _________________
Gradient: ____________ft/mi Sinuosity: ____________

6. The Mississippi River is a tenth order stream. Based on your answers to the two questions above, state what happens to the
gradient of streams as they increase in order.

7. What do you think happens to the discharge of streams as they increase in order, and what effect do you think this would

have on the relative number of fish living in each stream order within a basin?

C. Examine the enlarged part of the Strasburg, Virginia, quadrangle map in FIGURE 11.3 .

1. What drainage pattern is developed in this area, and what does it suggest about the attitude of bedrock layers in this area?

Explain your reasoning. ( Hint: Refer to FIGURE 11.2 and notice the stream pattern in relation to ridges and valleys.)

2. What is the gradient (ft/mi) and sinuosity of the small

stream, from E to F? (Refer to FIGURES 11.1 and 11.6

for help measuring gradient and sinuosity.) Show your
calculations. You will graph this data later in the activity.

Gradient: ____________ft/mi Sinuosity: ____________

3. What is the gradient (ft/mi) and sinuosity of Passage
Creek from G to H? (Refer to FIGURES 11.1 and 11.6

for help measuring gradient and sinuosity.) Show your
calculations. You will graph this data later in the activity.

Gradient: ____________ft/mi Sinuosity: ____________

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