Today, the rocks are in the process of being reduced to sand, but make for an interesting geological study.
All of the deserts of the world are different, but have sand, sun, dust, and wind in common. They are often the product of the environments that border them, and prevent rainfall or moisture from reaching them. Geologic studies reveal that these deserts were very different places as recently as 5,000 years ago. The periods of Earth's evolution are recorded in the rock sediments, and can be identified from satellite images. As the Earth evolved, and mountain ranges rose from the depths of the Earth, pushed forward by shifting plates and separating continents, it impacted the conditions of what eventually became desert regions on Earth.
The deserts are hostile environments for mankind, but they are not without life. Insects, and even elephants and lions can be found in some of the most hostile deserts like the Sahara and the Gobi deserts. It is impossible to predict what changes these deserts will undergo in the future as climate change impacts the Earth's environments. Yet there is much to be learned from these deserts about the history of the Earth, and about the evolution of other planets in our galaxy and the universe.
Buried beneath the sands of the desert are fossil records that reveal the life that once roamed these arid lands. The different layers of rock can be identified by their different color compositions, show that abrupt changes occurred as well as changes that occurred slowly, taking thousands of years to bring about the changes that we see in the deserts today. We can see the changes happening today.
"In 2005, a gigantic, 35-mile-long rift broke open the desert ground in Ethiopia. At the time, some geologists believed the rift was the beginning of a new ocean as two parts of the African continent pulled apart, but the claim was controversial. Now, scientists from several countries have confirmed that the volcanic processes at work beneath the Ethiopian rift are nearly identical to those at the bottom of the world's oceans, and the rift is indeed likely the beginning of a new sea . . . The new study, published in the latest issue of Geophysical Research Letters, suggests that the highly active volcanic boundaries along the edges of tectonic ocean plates may suddenly break apart in large sections, instead of little by little as has been...
Environmental Themes in Grapes of Wrath This essay reviews environmental themes from the following five books: Dust Bowl by Donald Worster, The Grapes of Wrath by John Steinbeck, Everglades: River of Grass by Marjory Stoneman Douglas, Killing Mr. Watson by Peter Matthiessen, and River of Lakes by Bill Belleville. This paper discusses the role that culture has played in environmental issues during the past century. Five sources used. MLA format. Environmental Themes Humans
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