What is the origin of greenstone belts? What will be an ideal response?
Greenstone belts developed in back-arc marginal basins that open and then close. When the basin
opens, volcanism and sedimentation take place, and then the basin closes during a period of
compression. During closure, the rocks are intruded by plutons and metamorphosed, and the
greenstone belt is folded into a syncline and also faulted.
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Explain how, without any meteorological instruments other than your eyes, you could identify the passage of an occluded front.
What will be an ideal response?
Protection of banks by planting trees and other vegetation is a form of ________
Fill in the blank(s) with correct word
Organized crime has moved into illegal wildlife smuggling because of the huge profits involved.
Answer the following statement true (T) or false (F)
The mineral fluorite is commonly sold in mineral shops as octahedral (8-sided) objects. This shape originates from ________
A) the growth of fluorite in caves and is the form the crystals grow in the open cavern B) cutting a larger crystal along four perfect cleavage planes, forming a cleavage fragment C) the typical crystal form of fluorite D) a pseudomorph (false form) of fluorite from replacement of a salt, potassium chlorite, that grows in octahedral crystals