How agates are formed
By: Trenna Sue Hiler
Agates are a semi-precious gemstone. They have rings or splotches of different colors and are often used to make jewelry or ornamental artwork. The ancient Greeks believed that amulets made from agates could be worn for favor with the Gods and safety on the seas...
By: Keith Redfern
A fault is a line along which pressures or movement in surrounding rocks have caused severe cracking. The angle of the pressures will largely determine the type of fault which is produced.In the case of a thrust fault, the angle is very low and...
By: Keith Redfern
Before explaining the title as a whole, the three words in the title need to be understood.Strike refers to the direction along a bed, or stratum, of rock. Many rock strata lie at an angle to the horizontal. The angle at which the strata...
By: Dr Pandula Siribaddana
Geological studies have brought many terms into the scientific vocabulary and ‘faults’ are one such term specifically used to describe ‘planar fractures or discontinuity in a volume of rock, across which there has been significant displacement along the fracture as a result of...
By: Jose Juan Gutierrez
Stalagmites are formed by dripping water coming out from the fractures on the ceiling of a cave. The dripping water contains mineralized solutions and carbon dioxide which build up on the floor of a cave, forming a stalagmite. Stalagmites are known as speleothems which are...
By: C.M. Tucker
Many people think affectionately of the Rocky Mountains as a hot chocolate sipping, ski lodge, playground. It is actually a combination of discontinuous mountains strung loosely together in a range of mountains. It extends from the eastern tip of Alaska down through Canada and to...
How the Rocky Mountains were formed
By: Rex Trulove
At one time, North America was a mostly flat land, largely covered by a shallow sea. The deposits of that ocean can still be found today, but the continent had few mountains. However, America now has several mountain ranges, including the tall and majestic Rockies...
The classification of sedimentary rocks
By: Keith Redfern
Sedimentary rocks are formed from material which was once a sediment. Therefore they are normally formed under a mass of water, making up a series of layers, or strata. These strata, originally horizontal, can often become folded or cracked (faulted) by earth movements. Older rocks...
By: Elizabeth M Young
People know that volcanoes have produced incredible amounts of matter that has been ejected into the atmosphere because our current atmosphere came from volcanic eruptions in the first place. However, volcanoes are not known for producing more greenhouse gases than humans. Humans win the greenhouse...
By: Ray Langley
Active volcanoes in Antarctica The continent of Antarctica is perched in the center of the Southern Sea, yet despite the subzero temperatures the land and its surrounding area is dotted with more then thirty-five volcanos. Antarctica is the southernmost land mass, and the fifth largest...

 

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