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To: gleeaikin

“The parallel lines visible on the Google Earth map do NOT have the characteristics of any of the dune processes shown. They have two slightly raised lines with a narrow sunken area between, or two slightly raised lines with a wide flat area between. In other words, the progression is raised, narrow sunken, raised, wide flat, raised, narrow sunken, raised, wide flat, raised, narrow sunken, raised, wide flat, etc. etc. etc. for dozens or more repetitions. Where are there any generally accepted as natural dune features like that???”

You are badly mistaken. One of the illustrations correctly describes how bidirectional winds form longitudinal dunes that tend to merge into the so-called linear dunes. What you fail to understand is your misperception of the Google images due to optical illusions and the degraded nature of the ancient dunes which are now represented by little more than consolidated soils with gentle rises and dips in a generally flat landscape. What you are misperceiving as canals is due in great part to the coloring of the soils by the sorting of the soils in the remnant bases of the dunes and valleys between the dunes, embayment of moisture between the slight rises, and coloration due to the plant life exploiting moisture and their contribution of material to color the soils. When you drive across those so-called stripes you misperceive as canals, you will be hard put to find evidence of a canal. Instead, you are seeing the remnants of the soils after 30,000 to 60,000 years of dune and other erosion and the formation of topsoils in an arid environment.

“In addition the ridges are not high like dunes tend to be especially when spaced that far apart.”

You wouldn’t expect them to be so. The dunes were relatively broad and low to begin with, and tens of thousands of years of erosion and degradation have reduced them to some very low rolling terrain covered in vegetation that stabilized the soils and colored them in the subsequent millennia.

“Look at the Google Map link at Comment 48. Go in close, 100 and 200 feet. Look at a lot of them in different areas. No high dunes, and always the wide, narrow, wide, narrow pattern.”

Try driving on the road across those dune stripes. Geological samples have been taken from inside the linear dunes. Can you even manage to see the dunes and valleys from the road? What you think you see in the Google satellite views are illusions which disappear when you look at them from closeup on the ground.


161 posted on 01/04/2015 6:59:02 PM PST by WhiskeyX
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To: WhiskeyX; All

Have you yourself actually driven through these areas, like down route 88?


163 posted on 01/05/2015 12:52:24 AM PST by gleeaikin
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To: WhiskeyX; pepsionice

What you think you see in the Google satellite views are illusions which disappear when you look at them from closeup on the ground.>>>>>>>>>>>>>>

What you see is not there?

Sounds like a Jedi mind trick, LOL.


210 posted on 10/30/2019 2:27:51 AM PDT by Candor7 ((Obama Fascism)http://www.americanthinker.com/articles/2009/05/barack_obam_the_quintessentia_1.html)
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