Why might so many “spot elevations” appear on the map at the corners or intersections of sections?
The question is based on Map T-17 in the back of the Lab Manual, showing a portion of the “Antelope Peak, Arizona,” quadrangle (scale 1:62,500; contour interval 25 feet); a portion of this map is reproduced in black-and-white in Figure 31-3 as well. The map’s marginal information is visible along the left and top margins (“T.5S,” “R.2E,” etc.).
What will be an ideal response?
Elevations may have been measured at the same time this area was being surveyed for the Public Land Survey.
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Manganese and phosphorite nodules can only be observed in areas of high sediment accumulation. Indicate whether the statement is true or false
What are the three basic steps in the recycling loop? What is the step that needs the most attention if the recycling loop is going to work?
What will be an ideal response?
Plants are important to the development of karst primarily because
A) openings adjacent to their roots serve as microchannels that allow water to enter the rock. B) the decay of large roots below the surface produces cavities which eventually enlarge to form caves. C) they supply organic acids that enhance the dissolution process. D) None of the above—plants play no role in the development of karst.
Explain the types of landscape features formed by valley-glacier erosion
What will be an ideal response?