1 Go to Google or any good torrent site and search for the torrent file you want to download, and get its link downloaded to your BlackBerry phone. 2  Next visit http://www.zbigz.com in your UC Web, Opera Mini, or the normal BlackBerry browser.
Best Answer: The age of continental rocks are older than that of sea floor rocks. Ocean crusts form and deplete rapidly, and are generally quite young (180 million years or so for the oldest). Continental crusts generally are older (billions of years) because they deplete slowly, and mainly through erosion.
During the 1940s and 1950s, scientists began using radar on moving ships to map large areas of the ocean floor in detail. The youngest rocks are found nearest to the mid-ocean ridges. The scientists Harry Hess invented echo-sounding devices for mapping the ocean floor. As the seafloor spreads apart, hot saltwater moves upward and flows from the cracks. As the new seafloor moves away from the ridge and becomes hotter, it moves upward and forms still higher ridges.