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Source: OG 12th Ed According to a recent theory, Archean-age gold-quartz vein systems were formed more than two billion years ago from magmatic fluids that originated from molten granite-like bodies deep beneath the surface of the Earth. This theory is contrary to the widely held view that the syst...
- by vikas.yaadav
Mon Jun 21, 2010 8:11 am- Forum: Reading Comprehension
- Topic: According to a recent theory
- Replies: 7
- Views: 5859