on April 16, 2022
What is the pattern of seafloor age in the ocean basins?
GeologyMagnetic polarity is normal at the ridge crest but reversed in symmetrical patterns away from the ridge center. This normal and reversed pattern continues across the seafloor. Seafloor is youngest at the mid-ocean ridges and becomes progressively older with distance from the ridge. What is the pattern of seafloor age in the ocean floor? The
on April 16, 2022
Why does Pleochroism occur?
GeologyThe primary cause of dichroism or pleochroism in minerals is due to adsorption of particular wavelengths of light. This selective adsorption of certain wavelengths of light causes the transmitted light to appear colored. Do all anisotropic minerals show pleochroism? Pleochrosim is a consequence of the fact that, for anisotropic minerls, different colors of polarized light
on April 16, 2022
What is an outcrop of rock?
GeologyRock outcrops are defined as visible exposures of bedrock or other geologic formations at the surface of the Earth. Where is the outcrop? An outcrop is an area of land where the underlying rocks are exposed. You can see many rocky outcrops throughout Shenandoah National Park in Virginia. The term outcrop and the alternative outcropping
on April 16, 2022
What does sekani mean in The Hate U Give?
GeologyWhat does sekani name mean in The Hate U Give? joy Maverick explains the meaning of his children’s names: Sekani for joy, Starr for a light in the darkness, and Seven because seven is a sacred, perfect number. Seven may not be perfect, but he’s a perfect gift to Maverick. What is the meaning of
on April 16, 2022
How a glacial horn is formed?
GeologyA horn results when glaciers erode three or more arêtes, usually forming a sharp-edged peak. Cirques are concave, circular basins carved by the base of a glacier as it erodes the landscape. The Matterhorn in Switzerland is a horn carved away by glacial erosion. How is a glacial horn formed Class 9? A glacial horn
on April 16, 2022
What are ammonite fossils?
GeologyWhat is a fossilized ammonite? Ammonites were shelled cephalopods that died out about 66 million years ago. Fossils of them are found all around the world, sometimes in very large concentrations. The often tightly wound shells of ammonites may be a familiar sight, but how much do you know about the animals that once lived
on April 16, 2022
Why does Amber preserve?
GeologyAmber is essentially fossilised tree resin – certain trees exude sticky, antiseptic resin to protect their bark from bacteria and fungi. As it leaks out of the tree, the resin can also trap any unfortunate creature in its path, preventing decay with its antiseptic nature and a lack of water. Is amber a good preservative?
on April 16, 2022
How is diorite mined?
GeologyIs diorite mined? Diorite, being a relatively rare mineral, is only commercially mined in small pockets of areas where its deposits occur, such as the United Kingdom and some other European countries, New Zealand, and a few sub-Saharan African, South American, and North American countries. Where is diorite most commonly found? volcanic arcs Diorite is
on April 16, 2022
What is fossil coral?
GeologyFossil coral is a natural gemstone that is created when prehistoric coral is gradually replaced with agate. Corals are marine animals and it is their skeletons that are fossilized and preserved. The fossil coral forms through hardened deposits left by silica-rich waters. Is fossilized coral valuable? Agatized fossil coral is highly prized by not only
on April 16, 2022
Which practice is suggested best during earthquake?
GeologyStay Safe During an Earthquake DROP down onto your hands and knees before the earthquake knocks you down. … COVER your head and neck (and your entire body if possible) underneath a sturdy table or desk. … HOLD ON to your shelter (or to your head and neck) until the shaking stops. What practice most