Robert Coin Thorne was an American paleontologist.
Thorne was born in Ashley, Utah.
He participated at the 2nd Captain Marshall Field Paleontological Expedition in 1926. Other participants were Elmer South. Riggs (Leader and Photographer), Rudolf Stahlecker (Collector) and Felipe Mendez. The expedition started in April 1926 and finished in November 1926.
The purpose was geology fossil collecting in Puerta Corral Quemado, Catamarca, Argentina, South America.
The expedition was successful, and even new species like Stahleckeria have been found during this collaboration. He was a veteran of World War I, an experienced outdoors man, mule driver and fossil collector.