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.
(Read: GM recall raises concerns about warning systems for auto safety.) The cars affected in North America include 1.7 million 2005 to 2007 Chevrolet Cobalts (and their equivalents, the Pontiac G5 and Canadian Pontiac Pursuit), 2006-07 Chevrolet HHRs, Pontiac Solstices and Saturn Skys, and the 2003-2007 Saturn Ion. GM issued a technical service bulletin on the cars in 2005.