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The origin of the state name is uncertain, but "Oregon" might have been derived from a 1715 French map which refers to the Wisconsin River as "Ouaricon-sint."
Another opinion is that the name "Oregon" stems from an English army officer's proposal for a trip in 1765, in which he refers to "the River called by the Indians Ouragon." Oregon was admitted as the 33rd state on February 14, 1859.
See name origins for all 50 states

Oregon Geology and Topography Map (from USGS):

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