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The Wilson cycle theory is based upon the idea of an ongoing cycle of ocean closure, continental collision, and a formation of new ocean on the former suture zone.The Wilson Cycle can be described in six phases of tectonic plate motion: the separation of a continent (continental rift), formation of a young ocean at the seafloor, formation of ocean basins during continental drift, initiation of ...
Centurion Pro Tour: Richard Ballantine's "Richard's Bicycle Book" included the Centurion Pro Tour (ultimately manufactured from 1976 to 1984) on his list of "Best Bikes" in both the 1978 and 1982 updates of his book — along with the Schwinn Paramount P-13, a bike that sold for two to three times the price of the Pro-Tour.
A 2008 Specialized Stumpjumper with full suspension A 2008 Specialized S-Works Transition carbon triathlon/time trial bike. In 1995, Specialized launched the Full Force brand. [13] Full Force was a lower-end mountain bike brand sold through sporting goods stores and discount retailers such as Costco. [5] The move angered some Specialized dealers.
The California hide trade was a trading system of various products based in cities along the California coastline, operating from the early 1820s to the mid-1840s. In exchange for hides and tallow from cattle owned by California ranchers, [ 1 ] sailors from around the globe, often representing corporations, swapped finished goods of all kinds.
Klein was a bicycle company founded by Gary Klein that pioneered the use of large diameter aluminium alloy tubes for greater stiffness and lower weight.. Klein produced his first bicycle frames while a student at the Massachusetts Institute of Technology during the 1970s, and full production runs of frames began in the 1980s.
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1912 Excelsior motorcycle on display at the California Automobile Museum 1914 Excelsior 1918 Henderson built by Excelsior. Excelsior Motor Manufacturing & Supply Company was an American motorcycle manufacturer operating in Chicago from 1907 to 1931. [1] It was purchased by Ignaz Schwinn, proprietor of bicycle manufacturer Arnold, Schwinn & Co ...
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