Metamorphic rocks: Hornfels
By: J. Lang Wood
Hornfels are part of a group of metamorphic rocks produced under certain natural forces. The word hornfels comes from the German meaning “hornstone” because it was associated with the horn-shaped peaks of the Alps. Hornfels are igneous rocks formed by contact metamorphism, meaning they...
By: Hai Shunxi
Hornfels is a variety of metamorphic rock; which means that the rock's original texture, mineralogy, or both have been changed. The most obvious changes occur in the minerals that make up the rock. Although the rocks never quite melt, some or all of the minerals...
Metamorphic rocks: Gneiss
By: J. Lang Wood
Gneiss rocks are metamorphic rocks that have been altered chemically from existing rocks into a denser type of rock. Compression, plate tectonics, stress and shearing warp and change existing rocks over time. Gneiss is granite that has been changed by these forces into denser rock...
By: Sylvia Harrison
Flooding can happen anywhere there is water. There are times however, when flooding is predicted and, especially those in low-lying areas, should be prepared to ensure the safety of themselves and their loved ones. The first step in being prepared for a potential flood is...
Potential of ocean wave power in green energy
By: J. Lang Wood
In the search to find renewable sources of energy for the future, solar, wind energy and biofuels are often mentioned, but ocean wave energy is yet another option that is already being used successfully in many countries across the world. This type of energy generation...
How ecosystems can be interrelated
By: Zsolt Hermann
In the Economist, a very interesting article was published today about the ecosystem within the human body, looking at a person not just as the usual biological, individual body, but as a collection of microbes, bugs and the human being combining into a harmonious ecosystem...
How to protect yourself during a tornado
By: Sam Smart
Tornadoes are deadly and very dangerous. These ferocious winds can be reported in various parts of the world. Tornadoes are mostly found in North America, especially the United States, due to cool and warm air masses that clash together, often forming funnel clouds. Any...
By: Hai Shunxi
Tuffs form an unusual group of rocks that combine the characteristics of two major rock groups, sedimentary rocks and igneous rocks. Like some sedimentary rocks such as sandstone, tuffs consist of deposits of separate particles that are later bonded together to form a solid rock...
By: Dr Pandula Siribaddana
For many decades, scientists were aware regarding the enormous potential of ocean waves to generate power in terms of electricity to fulfill the demand for renewable green energy. However, when compared to other renewable energy sources such as wind and solar power, the production of...
Nutrient pollution: Causes and consequences
By: Christyl Rivers
Over nutrition of alge by phoshates and nitrates causes Eutrophication and Hypoxia. This means polluted water sources and endangered ecosystems. Eutriphicaiton comes from the prefix, “Eu” meaning good, and trophic, “meaning tending toward.” In other words, in the natural world eutrophication refers...

 

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