Editing Grove Karl Gilbert (section)

==Geomorphology==
[[Image:Imbrium Sculpture Figure 14 G K Gilbert.jpg|thumb|right|Gilbert's 1893 drawing of ''sculpture'' around Mare Imbrium]]
[[File:1906 earthquake train.jpg|thumb|right|Derailed train after the 1906 San Francisco earthquake; photo by G.K. Gilbert]]
Gilbert joined the [[Harriman Alaska Expedition]] in 1899. Two weeks after the [[1906 San Francisco earthquake]], he took a series of photographs documenting the damage along the San Andreas fault from Inverness to Bolinas.

Gilbert is considered one of the giants of the subdiscipline of [[geomorphology]], having contributed to the understanding of landscape evolution, [[erosion]], river incision, and [[sediment]]ation. He was a [[planetary science]] pioneer, correctly identifying lunar craters as caused by impacts, and carrying out early impact-cratering experiments.<ref>Ronald Greeley, ''Planetary Landscapes'', 1985, Boston, Allen & Unwin</ref> He coined the term ''sculpture'' for a pattern of radial ridges surrounding [[Mare Imbrium]] on the moon, and correctly interpreted them in 1892 as [[ejecta]] from a giant impact.<ref name = "Gilbert" />{{rp|275}}  Gilbert was one of the more influential early American geologists.