Passage V
Seashore cliffs often lose rock or sediment to wave erosion. Figure 1 shows cliff compositions; cliff heights, in meters (m); and the net change in mean high water mark (MHWM), in m, from 1880 to 1970 along a section of shoreline. A net negative change in MHWM indicates a net loss of rock or sediment and a net positive change indicates a net gain of sediment.
Table 1 shows the percentage of a year that vertical sections of a cliff are exposed to wave erosion.
Figure 2 shows Cliff E and F erosion rates, in cm/yr, as they relate to percentage of a year that a cliff section is exposed to wave erosion.
25. According to the information in Figure 1, one property that was used to distinguish the various materials that compose the cliffs in the study area is the materials’:
Your Answer is
Correct Answer is A
Explanation
Looking at the key of figure 1, different legends represent mudstone (diameter<0.06 mm), glacial till (diameter<256 mm), and boulder clay till (diameter>256 mm), so the standard of distinction is the diameter of particles< /p>