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The rainbow Mountains, China

7/10/2020

1 Comment

 
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I’m off on a binge about the marvels of nature; particularly colors in geology.

My initial interest in travel was driven by my background in architecture. I wanted to see how ancient cultures expressed their ideas and values in their architecture. I still desire that, but experience has expanded my horizons to consider the impacts of the geology and other natural phenomenon on both the culture and the architecture. Now I’m all about interesting and unusual places.

It’s much easier these days to even find out about such locals than it was before the internet, but traveling to remote places is harder and harder for me. So I’m taking you on trips to interesting places through others, their writing and
photography.

THE RAINBOW MOUNTAINS, CHINA
I had never heard of the Rainbow Mountains, much less aspired to go there, when I ran onto a reference stating that something was a colorful as the Chinese Rainbow Mountains. I had to know.

They are located in Zhangye Danxia Landform Geological Park which is in the Gansu province of northwest China. The 200 square mile site was designated as a UNESCO World Heritage Site in 2009. The park has been popular with Chinese tourists for years but only now becoming an attraction for foreign visitors.
​
The two maps show the location in China and how that country relates to surrounding countries. The region we are talking about is in yellow.

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Photo Source: https://sites.psu.edu/passionallywagner/2015/11/16/rainbow-mountains/
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Photo source: https://www.chinadiscovery.com/gansu/zhangye/maps.html
SHAKE IT UP, BABY
These mountains are composed of sedimentary rock, cretaceous sandstones and siltstones, deposited in more or less flat layers millions of years ago, on the bed of the ocean.

​The deposits contained iron, trace minerals and organic matter. Fifty-five million years ago tectonic forces created the Himalayas Mountains as the Indian Tectonic Plate collided into the Eurasian Plate, folding the flat layers and thrusting them upward and exposing the sedimentary layers at weird angles.
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​The colors of sedimentary layers exposed by the mountain-making process often have complicated origins. The range of colors includes the primary colors and generally result from the compounds of iron, organic carbon, and trace minerals. Weathering and erosion remove the upper strata of siliciclastic rocks and bring to light amazing variations in color.

Image source: campbellhigh.org/ourpages/2017/

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A COUPLE OF IMPORTANT POINTS
Before you peruse the photographs, which blew my socks off, a couple of points about our perception of color to keep in mind.

Let There Be Light

Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. The human eye perceives only the reflected colors.

Together, the human eye and brain translate light into color. When an object appears black, the object or surface is absorbing all wavelengths light. When we see white, the object is reflecting all wavelengths of light. When it appears as a particular color, the object is reflecting only one wavelength (which we perceive as a color) and absorbing all others.

My first point is that light (intensity, direction, etc.) makes the difference in how something looks.

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​Beauty In The Eye Of The Beholder
The other point is that photographers usually want a beautiful, or at least artistic, representation of the subject being photographed.

Cameras can be set to manipulate light. I’m not implying the photos are doctored, but they are probably taken at the best time of day in the right weather to get the most vivid colors. Standing there, you might see what appears in the photo to the right. The professional photographs will show the mountains at their most dramatic. It is all in the lighting.                                           
                                                                                                                                                                                                                                         
Photo Credit: Tim Zachernuk - Photo Source: grist.org/stripey-mountain   
EVERYTHING'S COMING UP RAINBOWS

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Photo Credit: imaginechina.com;  Image Source: forbes.com/2016/rainbow-mountains
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                 Photo source: travelercorner.com/rainbow-mountains

This land is do dry that there are no plants on animals there. That’s dry. The hills consist of multi colored sandstone such as red, blue, green, brown and yellow.
 

The primary color is a deep red sandstone. Weathering, mixed with water and oxygen oxidizes elemental iron into iron oxide, which is notable for its dark red coloring. The Rainbow Mountains are largely characterized by this iron oxide staining of its sandstone Danxia formation.
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Photo Credit: Angelinaloren
Photo source: flickr.com/photos/75515041@N06


Instances occur where oxides form different colors; oxidized limonite or goethite will produce brown or yellow staining of sandstones, magnetite can form black staining of sandstones. If there is iron sulfide present, you will get a metallic yellow color imparted by the sulfur. Meanwhile, green coloring is often due to chlorite or iron silicate clays. The bluish-greenish-gray is produced from either organic plant matter or a mineral called glauconite found in marine environments. 
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         Photo source: in.musafir.com/blog/                                Photo Credit: imaginechina.com                                             Pinned by: Terra Hermética
                                                                                  Photo 
Source: forbes.com/2016/rainbow-mountains              Photo source: facebook.com/photo?fbid=2328

MORE RAINBOWS
I was surprised to discover another range of Rainbow Mountains, this time located in the Andes of Peru, about two hours drive from Cusco. After all, rainbows exist around the world, so why not rainbow mountains.

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Photo Credit: By Peruwikila - Own work, CC BY-SA 4.0,
Photo source: https://commons.wikimedia.org/w/index.php?curid=76653424

 
Vinicunca, or Winikunka, also called Montaña de Siete Colores, Montaña de Colores or Rainbow Mountain. Here there are seven colors due to mineralogical composition. Pink is red clay, mud and sand. The white comes from calcium carbonate, red from iron and clay. Green is a compound of phyllites and clays rich in ferro magnesian. Yellow due to sandstone rich in sulfurous minerals. The sources seem to rarely mention the blue coloration.

SO MANY WONDERFUL PLACES TO GO AND NOT ENOUGH TIME
 
Sources:
https://www.chinahighlights.com/zhangye/attraction/danxia-landform-geological-park.htm
https://www.forbes.com/sites/trevornace/2016/03/02/rainbow-mountains-china-earths-paint-palette/#4879b7db3e5e
https://www.huffpost.com/entry/rainbow-mountains-china-danxia-landform_n_3683840?guccounter=1&guce_referrer
http://inspire.lifepinner.com/2019/03/29/true-colors-of-china-rainbow-mountains/
https://www.architecturaldigest.com/story/rainbow-mountains-china
https://www.theguardian.com/world/gallery/2013/aug/01/rainbow-mountains-china-in-pictures
https://www.chinahighlights.com/zhangye/attraction/danxia-landform-geological-park.htm
https://www.theguardian.com/world/gallery/2013/aug/01/rainbow-mountains-china-in-pictures#/?picture=414163198&index=0
https://www.pantone.com/color-intelligence/articles/technical/how-do-we-see-color
https://www.minerals.net/resource/property/color.aspx
https://www.wonderopolis.org/wonder/how-do-rocks-get-their-colors
https://en.wikipedia.org/wiki/Zhangye_National_Geopark
https://csmgeo.csm.jmu.edu/geollab/Fichter/SedRx/color.html
https://weather.com/science/news/breathtaking-rainbow-rocks-china-20130710
Photos only:
https://www.facebook.com/photo?fbid=232810990695661&set=pcb.232812080695552
https://grist.org/living/zen-break-check-out-chinas-gorgeous-stripey-mountains/
https://in.musafir.com/blog/most-extraordinary-mountains-in-the-world.aspx
https://in.musafir.com/blog/most-extraordinary-mountains-in-the-world.aspx
https://www.flickr.com/photos/75515041@N06/10791466616
http://travelercorner.com/rainbow-mountains-zhangye-danxia-landform-china/




1 Comment
Brian link
5/18/2022 09:29:25 am

Hi, Its a wounderful post.Thanks for your nice post. Do you know? Ever dreamed of traveling all the way over the rainbow? It turns out that’s easier than you think. All you need to do is book a plane ticket to Peru.

Reply



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    Author R. Ann Siracusa

    Novelist, retired architect and urban planner, world traveler, quilter, owl collector, devoted wife-mother-grandmother, great-grandmother, and, according to some, wild-assed liberal.

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