Earth's physical resources: extracting coal and oil - for iPad/Mac/PC artwork

Coal formation

Earth's physical resources: extracting coal and oil - for iPad/Mac/PC

English - June 23, 2009 02:10 - 5 minutes - 61.8 MB Video
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Designing a system of mining to suit the split seams in the Northumberland coal field. Analysing the small detail reveals how it was formed.