Photo: Lower Warm Springs Quadrangle: Questions: a. Using Google Maps™, pan your
ID: 109004 • Letter: P
Question
Photo: Lower Warm Springs Quadrangle:
Questions:
a. Using Google Maps™, pan your map to (36.575746, -117.050153) coordinates. Zoom out from this area some and by looking at the aerial image of this region, what desert landform makes up the darker colors as seen on the alluvial fan?
b. Continuing with your analysis of the area located in Question (a), what do the linear markings on the faces of the fans represent?
c. Still continuing with your analysis of the alluvial fan in Google Maps™, follow the fan up to the edge of the mountain. Does it appear that erosion or deposition has been more prominent at the top of the fan?
d. How can you tell that erosion or deposition has been more prominent?
e. Zooming out on your Google Maps™ location, does it appear that the alluvial fans in the area are creating a bajada?
f. Finishing your analysis in Google Maps™, suggest a reason as to why the sizes of alluvial fans in the region vary in size.
g. Using the Lower Warm Springs Quadrangle, what kind of sand dunes appear to be most common in this dune field?
h. How can you tell the type of sand dune identified in Question (g)?
i. Analyzing the quadrangle of these sand dunes, from which direction does the prevailing wind blow and which way will the sand dunes continue to progress?
Explanation / Answer
a) alluvial fan can be described as it is a cone shaped deposite of sediments crossed and built up by streams. if a fan is buit up to the debris then it is probably the slopy land area which can be shown on map by inclination in the arial view of it.
b) the linear marking on the face of the deposite represent that it is not too much slopy and that why when we take the arial view, we just get it in the linear format. and also it is the mean to which the alluvial fan consisted in the area described above.
c) it can be possible to erosion to take place at the top of the mountains of alluvial because to the fact of blow of wind the surface of the soil may reduced rapidly and hence due to which the same process proceed further for the complete erosion to take place.
d) it can be possible or we can say more predominent because if the fan is reside at the top layers and the region is full of storm to take place. in that case erosion can be more to take place rather to deposition. the factors which make it predominent are height slope and the region where it is reside.
e) you may know that bajada is a cosist of a series of coalescing alluvial fan along with a mountain front.thses are deposited in the form top layers of sedients on the mountains. the alluvial area in the given maps are bajada because it forming the sediments and depends upon other factor to satisfy the conditions.
f) the size of fan may vary from one region to another. this can be understand by the weather patern formed and changes from region to region. the fac is spread effectively at rocky places or at slopy mountains regions. but the temperaure as well as weather influence such as storm and weathering produced erosion in one place and deposition in another place. due to which the size varied from one to another.
g) the region is of high temperature range so from the concept of lower warm spring quadrangle the dunes will be a powerful high sand dunes.
h) it is due to the fact that the region of sand dunes is of alluvial fans which generlly have warmth temperatures as well as drying debries. this lead to such sand dunes in that region.
i) the rotation of earth and temperature will effect to the flow of winds and the winds are the only which responsible for the sand dunes. so according to the concept kept in mind we can analyses that it will be toward the southeast side.