Tarr, Ralph (Stockman) (1864-1912)

US geologist and geographer. He organized the Cornell Greenland Expedition that travelled with Robert Peary (1896) and led the National Geographic Society's expeditions to Alaska (1909, 1911), later writing Alaskan Glacier Studies (1912). He taught at Cornell (1892-1912), publishing textbooks like Elementary Physical Geography (1895).

Tarr was born in Gloucester, Massachusetts. He studied geology and physiography at Harvard under Nathaniel Shaler and William Davis, graduating in 1891.