Although more widely remembered for his contributions to the biological sciences, Charles Darwin first made his scientific reputation as a geologist.
His formal geological training was limited, but intense; he accompanied the eminent geologist Adam Sedgwick "geologising", that is,describing and mapping the rocks of Wales and learning the ways of the field geologist.
A few months later Darwin was on board the Beagle, with a volume of Charles Lyell’s new book, Principles of Geology. Lyell was the foremost geologist of the day. With this as his guide, Darwin made observations during the voyage that led to publications on the formation of coral reefs and volcanic islands and the geology of South America, contributions that still stand, today.
Photo: Rocks collected by Charles Darwin during his voyage on the Beagle. credit: http://www.flickr.com/photos/gruts/3802735409/
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