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.
General Motors is divided into five business segments: GM North America (GMNA), Opel Group, GM International Operations (GMIO), GM South America (GMSA), and GM Financial.