What are the methods of surface mining?
GeologyThe three most common types of surface mining are open-pit mining, strip mining, and quarrying. See also mining and coal mining. What are the 5 types of surface mining? There are 5 main types of surface mining, which are used in various degrees and for different resources. These mining categories are: strip mining, open-pit mining,
What kind of volcanoes form at subduction zones?
GeologyStratovolcanoes tend to form at subduction zones, or convergent plate margins, where an oceanic plate slides beneath a continental plate and contributes to the rise of magma to the surface. Do composite volcanoes form at subduction zones? A composite volcano forms in subduction zones when a crustal plate is forced into the mantle and begins
What causes upper level divergence?
GeologyDivergence occurs when a stronger wind moves away from a weaker wind or when air streams move in opposite directions. When divergence occurs in the upper levels of the atmosphere it leads to rising air. What conditions do divergent winds cause? The convergence of horizontal winds causes air to rise, whereas the divergence of horizontal
How many eruptions are associated with the Yellowstone Plateau?
GeologyThree extremely large explosive eruptions have occurred at Yellowstone in the past 2.1 million years with a recurrence interval of about 600,000 to 800,000 years. More frequent eruptions of basalt and rhyolite lava flows have occurred before and after the large caldera-forming events. How many eruptions have there been at Yellowstone? three Yellowstone has had
What are some landforms in the Appalachian plateau?
GeologyMountain ranges existing in the Appalachian Plateaus include the Catskill, Pocono, Allegheny, and Cumberland Mountains. In addition to these sedimentary rocks, beds of coal are locally significant throughout the Appalachian Plateaus, making this area the heart of the American coal industry. What landforms are found in the Appalachians? Geographically, the region is also diverse. Physiographic
What is the meaning of U shaped valley?
GeologyDefinition: U-shaped valleys form through glacial erosion. Glaciation develops in established v-shaped river valleys where the ice erodes the surrounding rocks to create a “U” shaped valley with a flat bottom and steep sides. Glacier movement is driven by gravity. What do you mean by U-shaped valley for Class 7? U-shaped valley is the landform
How do you prevent liquefaction?
GeologyThe most common way of preventing the occurrence of liquefaction are foundation soil improvement methods. One type of improvement is to replace the susceptible soil with the appropriate amount of gravel. A more favourable form of the granulometric soil curve in a narrower location is obtained in this way. What method prevents damage from liquefaction?
Where are the asteroid belt the Kuiper belt and the Oort cloud what kind of objects are in or come from them?
GeologyThe Kuiper Belt shouldn’t be confused with the Oort Cloud, which is a much more distant region of icy, comet-like bodies that surrounds the solar system, including the Kuiper Belt. Both the Oort Cloud and the Kuiper Belt are thought to be sources of comets. What are and where are the Kuiper Belt and the
Are there any transitional species?
GeologyMany more transitional fossils have been discovered since then, and there is now abundant evidence of how all classes of vertebrates are related, including many transitional fossils. Specific examples of class-level transitions are: tetrapods and fish, birds and dinosaurs, and mammals and “mammal-like reptiles”. Is there such thing as a transitional fossil? Transitional fossils are
What happens if an earthquake hits the San Andreas Fault?
GeologyDeath and damage About 1,800 people could die in a hypothetical 7.8 earthquake on the San Andreas fault — that’s according to a scenario published by the USGS called the ShakeOut. More than 900 people could die in fires, more than 600 in building damage or collapse, and more than 150 in transportation accidents. What