1. Using Google Maps™, pan your map to ( 36.721365, -117.064679 ) coordinates. Z

Question

1. Using Google Maps™, pan your map to (36.721365, -117.064679) 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?

2. Continuing with your analysis of the area located in Question 1, what do the linear markings on the faces of the fans represent?

3. 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?

4. How can you tell that erosion or deposition has been more prominent?

5. Zooming out on your Google Maps™ location, does it appear that the alluvial fans in the area are creating a bajada?

6. Finishing your analysis in Google Maps™, suggest a reason as to why the sizes of alluvial fans in the region vary in size.

7. Using the Dumont Dunes Quadrangle, what kind of sand dunes appear to be most common in this dune field?

8. How can you tell the type of sand dune identified in Question 7?

9. 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?

Link to the image, same image different files:

https://imgur.com/a/wy8UX

http://i68.tinypic.com/1zgda35.jpg

Explanation / Answer

1) it is due to the presence of dark rhyolite rock contain high region. These materials get eroded, transported and deposits as alluvial fan.

2) the lines represent flow of water. Water due to rain flows through these line like channels

3) in top of mountain it appears like more erosion is carried out. But most of it get deposited lowest portion of alluvial fan

4) erosion can be identified by the tributeries or density of channel created by water flow. While deposition is identified by alluvial fan

5) since western part is flat and eastern part is hugh mountain, Sediments are deposited in series of alluvial fans known as bajadas

6) size of alluvial fan depends on height of mountain, type of rock. Flow of water. These will be different in different places.

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