Distinguish between regional and contact metamorphism
What will be an ideal response?
Regional metamorphism results from mountain building. It affects large volumes of rock and does so gradationally. The interior-most rock within the area undergoing orogenesis will be the most highly metamorphosed, whereas the edges will be the least altered. Contact metamorphism arises from the intrusion of a magma body that essentially "cooks" the country rock that it is intruding into. This metamorphism is also gradational, lessening the farther away from the intrusion. Contact metamorphism is driven by heat, and regional metamorphism is driven by pressure.
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The smallest channels eroded by the flow of water, only a few centimeters deep, are
A) rills. B) alluvial fans. C) moraine. D) sials.
________ occurs when weathering concentrates minor amounts of metals scattered through unweathered rock into economically valuable concentrations
A) Passive collection B) Secondary enrichment C) Concentration D) Hydraulic fracturing
Judge the following sentence according to the criteria given below: Nutrient availability must be the most important factor affecting the distribution of life in the oceans BECAUSE the coastal zone is much more productive than the shallow open ocean
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Where is the highest plateau in the world?
A. Iceland B. Western North America C. Australia D. Western South America E. Southwest China