The Hidden Layers of Earth and Tectonic Plate Movements discovermagazine.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from discovermagazine.com Daily Mail and Mail on Sunday newspapers.
Continental shield, any of the large stable areas of low relief in the Earth’s crust that are composed of Precambrian crystalline rocks. The age of these rocks is in all cases greater than 540 million years, and radiometric age dating has revealed some that are as old as 2 to 3 billion years.
Vikings brought animals to England as early as the year 873 -- Secret History -- Sott net sott.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sott.net Daily Mail and Mail on Sunday newspapers.