Find “Trail Canyon” coming out of the Panamint Range in the center of the map (a dirt road is shown coming down the fan of Trail Canyon). Why are the contours showing the Trail Canyon alluvial fan so irregular (many tiny zigzags)? (Hint: What surface features of the fan are these zigzags showing?)
The question is based on Map T-10, the “Furnace Creek, California” quadrangle (scale 1:62,500; contour interval 80 feet; dotted lines represent 20-foot contours). This portion of the Furnace Creek quadrangle shows the Panamint Range and the western side of Death Valley in Death Valley National Park (36°19'08"N, 116°53'25"W). Several large alluvial fans can be seen along the eastern front of the Panamint Range. The basin floor here is called the Death Valley “salt pan,” because salts have accumulated here in great thicknesses.
What will be an ideal response?
The alluvial fan is heavily gullied with ephemeral streams.
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