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Triton's surface is considered relatively young, not more than 10 million years by uniformitarian models.<ref name=Schenk>Schenk, Paul M., and Zahnle, Kevin. "[http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WGF-4PFW6FV-2&_user=10&_coverDate=12%2F01%2F2007&_rdoc=10&_fmt=summary&_orig=browse&_srch=doc-info(%23toc%236821%232007%23998079998%23674080%23FLA%23display%23Volume)&_cdi=6821&_sort=d&_docanchor=&_ct=19&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=cea35d4a7d94052a325123729f8dfcf0 On the Negligible Surface Age of Triton]." ''Icarus'', 192(1):135-149, December 1, 2007. <doi:10.1016/j.icarus.2007.07.004 > Accessed May 9, 2008.</ref> Geologists count 100 impact craters on the leading hemisphere (the one facing in the direction of its motion around Neptune) and suspect that debris from collisions involving the inner or outer moons of Neptune have struck Triton on this leading surface.

Triton's surface is considered relatively young, not more than 10 million years by uniformitarian models.<ref name=Schenk>Schenk, Paul M., and Zahnle, Kevin. "[http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WGF-4PFW6FV-2&_user=10&_coverDate=12%2F01%2F2007&_rdoc=10&_fmt=summary&_orig=browse&_srch=doc-info(%23toc%236821%232007%23998079998%23674080%23FLA%23display%23Volume)&_cdi=6821&_sort=d&_docanchor=&_ct=19&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=cea35d4a7d94052a325123729f8dfcf0 On the Negligible Surface Age of Triton]." ''Icarus'', 192(1):135-149, December 1, 2007. <doi:10.1016/j.icarus.2007.07.004 > Accessed May 9, 2008.</ref> Geologists count 100 impact craters on the leading hemisphere (the one facing in the direction of its motion around Neptune) and suspect that debris from collisions involving the inner or outer moons of Neptune have struck Triton on this leading surface.

Triton has many deep chasms on its surface. In addition, [[Voyager 2]] recorded multiple [[geyser]]-like eruptions of [[nitrogen]] gas and dust from beneath the surface. This gas has created a very low-pressure "[[atmosphere]]" that is the only atmosphere-like feature of any solar system body other than earth to have nitrogen as its principle component.<ref name=Hamilton/>

Triton has many deep chasms on its surface. In addition, [[Voyager 2]] recorded multiple [[geyser]]-like eruptions of [[nitrogen]] gas and dust from beneath the surface. This gas has created a very low-pressure "[[atmosphere]]". It is the only moon with an atmosphere besides [[Titan]].

The trailing hemisphere of Triton has a puckered surface with few, widely-spaced ridges and valleys and far fewer impact craters. This "cantaloupe terrain" has not been observed on any other celestial body.<ref name=ps>"[http://www.planetary.org/explore/topics/neptune/triton.html Neptune's Moon Triton]." ''The Planetary Society''. Accessed May 10, 2008.</ref>

The trailing hemisphere of Triton has a puckered surface with few, widely-spaced ridges and valleys and far fewer impact craters. This "cantaloupe terrain" has not been observed on any other celestial body.<ref name=ps>"[http://www.planetary.org/explore/topics/neptune/triton.html Neptune's Moon Triton]." ''The Planetary Society''. Accessed May 10, 2008.</ref>