What is the reason for the formation of trough?

The rock formations with complex valleys are composed of huge sand dunes that began to deposit in Jurassic10.50 billion years ago. Dunes are often covered with red sand layers soaked in underground water. As time goes on, minerals in the water condense sand into sandstone, forming a layered structure.

This ancient sand dune eventually formed what geographers call "Navajo sandstone". Later, with the rise of Colorado Plain and long-term wind erosion and water erosion, the sandstone layer in the canyon gradually emerged clearly.

Smooth, sculptural sandstone and smooth lines on rocks create a dazzling three-dimensional effect. ?

Fine rock lines actually clearly show the movement process of dune deposition. The change of particles reflects the difference of color depth of sandstone with different sedimentary mineral content. Red is mainly produced by the oxidation of iron and manganese. These colors are not immutable, and often form more complex and abstract patterns at intersections and corners.

Extended data:

Correlation extension: A case study of Jingbian Wave Valley;

The rock in Jingbian trough is called red sandstone, and academically it is called "soft sandstone". It was formed between Paleozoic Permian and Mesozoic Triassic, Jurassic and Cretaceous. This is an era with the most active geology, the most lush life and the largest animals in the history of the earth.

It is a miracle that Jingbian Langgu can have such a stone landscape in this loess-covered place in northern Shaanxi. The name "trough" in Jingbian was named by the photographer who came here, which is different from the trough in Arizona. The valley in Arizona has a white line between red and white, and the valley in Jingbian is mainly red.

Baidu encyclopedia-trough

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