Metamorphic rocks are formed when existing rocks (igneous, sedimentary or even other metamorphic rocks) are subject to agents of change. These causes of metamorphism such as heat more than 200C (but below the boiling point of the rock) and pressures…
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Metamorphism in geology is when one type of rock is transformed into another type of rock called a metamorphic rock. The word metamorphic comes from the Greek words meaning “change” and “form.” There are two main factors that can cause the…
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The metamorphosis of rocks generally occurs under pressure and high temperatures. When exposed to these conditions the composition of the rock can also change. There are other conditions that can change the composition of the rock as well. When gases, hot…
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Chemical, or crystalline, sedimentary rocks contain mineral crystals that are made from dissolved water within them. These rocks are classified by the chemistry of the minerals. Their formation does not depend on any chemical or biochemical process. There are three…
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Metamorphic rocks are one of three classes of rocks, distinguished from both sedimentary and igneous rocks, because of the way they form. The process that forms metamorphic rock is known as metamorphism, a word derived from the Greek “meta” and…
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The name geologist is a catch all name for several jobs that require a lot of specialized training and education. There are five different types of geologists jobs in which a person can specialize in. They include the volcanologist, paleontologist,…
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Few can fail to be impressed by the Grand Canyon, which is approximately one mile deep. Hiking from the North to the South Rim involves a distance of 21 miles, a vertical descent and spectacular scenery. However, the Grand Canyon…
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Modern geology has come a long way since James Hutton published his theory of the Earth in the late 18th century. Today, geologists serve the public in many ways. A closer look at something as simple as the local convenience…
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The Loma Prieta earthquake of 1989 occurred at 5:04 p.m., right before the World Series baseball game between the San Francisco Giants and the Oakland A’s. It was an awakening for seismologists to be more aware of these natural disasters…
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A GUIDE TO PLATE TECTONICS: HOW CONTINENTS MOVE The story of Plate Tectonics is a fascinating story of the lighter continents drifting majestically from place to place above the heavier mantle, then breaking apart, colliding, and grinding against each other;…
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