Editing Grove Karl Gilbert (section)

===Rockies geologist===
[[File:Headward erosion.jpg|thumb|right|Headward erosion of a gully; photo by G.K. Gilbert]]

Gilbert joined the [[John Wesley Powell|Powell]] Survey of the [[Rocky Mountains|Rocky Mountain]] Region in 1874, becoming Powell's primary assistant, and stayed with the survey until 1879.<ref>[[Wallace Stegner]], ''Beyond the Hundredth Meridian: John Wesley Powell and the Second Opening of the West'', University of Nebraska:Lincoln</ref> During this time he published an important monograph, ''The Geology of the [[Henry Mountains]]'' (1877). After the [[U.S. Geological Survey]] was created in 1879, he was appointed to the position of Senior Geologist and worked for the USGS until his death (including a term as acting director).

Gilbert published a study of the former ancient [[Lake Bonneville]] in 1890 (the lake existed during the [[Pleistocene]]), of which the [[Great Salt Lake]] is a remnant. He named it after the army captain [[Benjamin Bonneville]], who had explored the region. The type of [[river delta]] that Gilbert described at this location has since become known to geomorphologists as a [[River delta#Types|Gilbert delta]].<ref name=chidsey>"Geological and Petrophysical Characterization of the Ferron Sandstone for 3-D Simulation of a Fluvial-deltaic Reservoir". By Thomas C. Chidsey, Thomas C. Chidsey, Jr (ed), Utah Geological Survey, 2002. {{ISBN|1-55791-668-3}}. pp. 2–17. [https://books.google.com/books?id=jacORXGQG9AC Partial text] on Google Books.</ref>