on April 17, 2022
What are the main causes of mass movement?
GeologyGravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth’s surface, pulling everything in a direction toward the center of the Earth. What are the 3 factors that cause mass movement? Such factors include: weathering or erosional debris cover on slopes, which is usually liable to
on April 17, 2022
What mineral can scratch halite?
GeologyOn the Mohs Hardness Scale of 1 to 10, rock salt is a 2.5, which means it is a very soft mineral that is approximately the same hardness as your fingernail. You can scratch salt with a copper penny, pocketknife or steel file. Can you scratch halite? The short answer is no, halite will not
on April 17, 2022
In what environment do stromatolites form today?
GeologyModern stromatolites are mostly found in hypersaline lakes and marine lagoons where extreme conditions due to high saline levels prevent animal grazing. One such location where excellent modern specimens can be observed is Hamelin Pool Marine Nature Reserve, Shark Bay in Western Australia. How and where do stromatolites form today? Stromatolites, also known as layered
on April 17, 2022
What color is granitic magma?
GeologyGranitoid is a general, descriptive field term for lighter-colored, coarse-grained igneous rocks. Petrographic examination is required for identification of specific types of granitoids. Granites can be predominantly white, pink, or gray in color, depending on their mineralogy. What is the color of magma? Lava (magma that has erupted onto the Earth’s surface) is visually mesmerizing
on April 17, 2022
How are synclinal mountains formed?
GeologySynclines are formed when tectonic plates move toward each other, compressing the crust and forcing it upward. What is a synclinal mountain? What is a synclinal mountain? A synclinal mountain is where the geological structure is down-folded sedimentary rock, but the topography you see in the land is not a valley. Instead, a mountain occupies
on April 17, 2022
How does the earth lose heat?
GeologySince Earth is surrounded by the vacuum of outer space, it cannot lose energy through conduction or convection. Instead, the only way the Earth loses energy to space is by electromagnetic radiation. How is heat lost in the atmosphere? Radiation of heat occurs when the ambient temperature is less than body temperature and heat is
on April 17, 2022
What is called weathering?
GeologyWeathering is the breaking down or dissolving of rocks and minerals on Earths surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion. What is weathering also called? Physical
on April 17, 2022
How does the Richter scale increase logarithmically?
GeologyThe Richter scale has no lower limit and no maximum. It’s a “logarithmic” scale, which means that each one-point increase on the scale represents a 10-fold increase in the magnitude of the quake. Does the Richter scale increase exponentially? The Richter scale is used to rate the magnitude of an earthquake — the amount of
on April 17, 2022
What rock does sandstone turn into?
Geologyquartzitequartzite. What does sandstone turn into? With a great deal of heat and pressure, sandstones turn to the metamorphic rocks quartzite or gneiss, tough rocks with tightly packed mineral grains. Does sandstone turn to shale? Over time, compressed sandstone and limestone become shale. Shale typically occurs in a broadsheet, several meters thick. Depending on the
on April 17, 2022
What happened after the Christchurch earthquake 2011?
GeologyThe earthquakes interrupted power and water supplies, three unoccupied buildings collapsed and there was again liquefaction in eastern suburbs and rockfalls in hill areas. One person died after tripping on uneven ground caused by the earthquake. What was the aftermath of the 2011 Christchurch earthquake? The Christchurch earthquake caused extensive damage to infrastructure and buildings.