Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made ...
The German mining engineer Georgius Agricola (1494-1555) dedicated in his textbook "De re metallica" (1556) an entire chapter to the distribution of valuable rocks in earth's crust. The written ...
March 23, 1769 marks the birthday of pioneering stratigrapher William Smith, who is also credited with creating the first useful geological map, however like many other great accomplishments also ...
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