By: Sarah Cagle
Canyons are deep gouges in the Earth characterized by steep sides and a narrow base. These landforms can be massive, occupying miles of territory. Canyons are usually much deeper and more difficult to access than ravines or other deep landforms. One of the best and...
By: Omar Salvador
The Grand Canyon is an overwhelmingly imposing chasm that seem to creep in the middle of the Arizona Desert. It is approximately 277 miles (446 kilometers) long, about 18 miles (29 kilometers) wide, and plunges to an average depth of 1 mile (1.61 kilometers)...
By: Catherine Duffy
The United States Department of Agriculture employs soil scientists to survey soil conditions throughout the United States. This information is valuable in determining the best crops for the location as well as for monitoring changes in soil textures and make up after severe flooding or...
By: Blaise Pascal
Gorges are a very interesting physical feature of the earth’s surface. They are usually deep openings between higher ground elevations that typically have a river flowing through them. The sides of the gorge are usually steep and the width of a gorge is usually...
By: Anosha Tariq
The thin layer on the surface of the earth, on which the terrestrial living beings survive, is called soil. This layer of material holds the roots of plants. These plants grow by absorbing water and required nutrients from the soil. The plants are consumed by...
Types of soils
By: ek ellis
Soil is defined by Answers.com as a “top layer of land, the top layer of most of the Earth's land surface, consisting of the unconsolidated products of rock erosion and organic decay, along with bacteria and fungi”. There are many variations of soil...
By: Shannon Farlouis
The Native American Indians first discovered limestone in Indiana. Limestone is a type of rock that is formed of calcium carbonate. The Native Americans used this limestome around windows and doors. Limestone was used to build bridges, tunnels and railroads. Indiana limestone is also called...
By: Gemma L. Reece
Catacombs are man-made underground chambers that are connected with a network of tunnels which were used for religious purposes and more often than not for storing the dead or for burials. Many cultures have historically used catacombs to bury their dead, in fact people have...
By: Allen Teal
For some reason, catacombs tend to carry a negative or at least creepy connotation in society today. There have been catacombs in existence for thousands of years. The most widely known catacombs are in Rome. Coming in a close second are the catacombs of Paris...
By: Tim Souhrada
The most violent super volcano explosion over the last several million years is thought to have killed an estimated 60% of humans alive at the time of its eruption. Scientists can't predict when and where the next eruption will take place. They haven’t even...

 

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