Structure of the Earth discontinuity (a second order discontinuity). The uppermost mantle together with the crust constitutes the lithosphere. The crust-mantle boundary occurs as two physically different events. First, there is a discontinuity in the seismic velocity, which is most commonly known as the Mohorovičić discontinuity or Moho. The cause of the Moho is thought to be a change in rock composition from rocks containing plagioclase feldspar (above) to rocks that contain no feldspars (below). Second, in oceanic crust, there is a chemical discontinuity between ultramafic cumulates and tectonized harzburgites, which has been observed from deep parts of the oceanic crust that have been
What the Day Owes the Night (film) and Younes. Younes's family owns a wheat field in the countryside next to Oran, expecting an abundant harvest. Unfortunately, the field is set on fire by the Cheikh henchmen, to whom the family owes money. Unable to pay the debt, the family is expropriated by the colonial administration to the benefit of the Cheikh whose first goal was to get the family's land. Now ruined and without any money, they move to the nearest city, Oran, where Issa, Younes's father, works difficult jobs for a pittance. Physically and psychologically worn, Issa is resigned to give his son away to Mohamed,