Pits formed by the deflating action of wind are called Blowouts. Due to wind action in desert lifting and blowing away of a loose material from ground takes place and this lead to a general lowering of land surface known as Blowout or Deflation Hollows.
Which of the following types of coal represents the first stage of formation of coal?
Peat is the first stage in the formation of coal. Normally, vegetable matter is oxidized to water and carbon dioxide. However, if plant material accumulates underwater, oxygen is not present and so only partial decomposition occurs.
Aluminum is the most abundant metal in the earth's crust, but it is never found free in nature. All of the earth's aluminum has combined with other elements to form compounds. Two of the most common compounds are alum, such as potassium aluminum sulfate (KAl(SO4)2.
Which European country has over 200 volcanoes, many of them still active?
Iceland have over 200 volcanoes, many of them still active. The Land of Ice and Fire, Iceland is a natural wonderland where the freezing forces of glaciers and arctic weather are in constant battle with the explosive heat of the earth. Thousands flock to Iceland to witness its volcanoes and the marvels they have (and continue to) create; during eruptions, even more rush over for their chance to see one of the earth’s most dramatic and beautiful phenomena.