How the Earth Was Made Americas Gold DVD

• Additional Details
• Format: Color, DVD-Video, NTSC
• Rating: TVPG
• Number of Discs: 1
• Run Time: 50 Minutes
• Region: 1
• Aspect Ratio: 1.33:1
• Language: English
• Studio: A&E Television Networks
• DVD Release Date: April 12, 2010
• Closed Captioning: Yes

Gold dates from the time of the supernova explosion that gave birth to the building blocks of our solar system. When it was created, the Earth included a tiny percentage of gold atoms, and over the aeons geologic processes have concentrated it into various nooks and crannies around the globe. The best of it is in the ancient Precambrian rocks in South Africa, where the deepest mines in the world extract it. In other regions of the world, gold can be gathered from younger sedimentary rocks that have been eroded off older Precambrian rocks. The American gold rush was this type of deposit. Now in Nevada, sedimentary rocks are leached on a truly vast scale to extract the gold.

Titanic forces — colliding continents, raging volcanic eruptions and the grinding power of glaciers — have been carving and sculpting the Earth’s crust for 4.5 billion years.

HOW THE EARTH WAS MADE peels back the millennia, combining cutting-edge scientific research with stunning aerial photography and exotic locations, as it investigates how these slow but immensely powerful forces of geology shaped and continue to shape our evolving world.