Another theory is that the mantle flows neither in cells nor large plumes but rather as a series of channels just below the Earth's crust, which then provide basal friction to the lithosphere. This theory, called surge tectonics, became quite popular in geophysics and geodynamics during the 1980s and 1990s.
General Motors to discontinue Chevrolet Tavera, Sail and Enjoy in India. According to a report in ET Auto, General Motors is planning to discontinue the production and sale of three Chevrolet products, Tavera, Sail and Enjoy in order to make way for newer products that the company plans to launch in the coming months.
GM Holden to Stop Auto Manufacturing in Australia in 2017. General Motors Co.âs Holden unit, Australiaâs largest carmaker, said it would shutter production lines in 2017 after 69 years, joining Ford Motor Co. in exiting an economy struggling with high costs and a strong currency.