They are geologically and biogeographically the easternmost part of the Greater Antilles ,  the northern islands belonging to the Puerto Rican Bank and St. Croix being a displaced part of the same geologic structure. Politically, the British Virgin Islands have been governed as the western island group of the Leeward Islands , which are the northern part of the Lesser Antilles , and form the border between the Caribbean Sea and the Atlantic Ocean. The islands fall into three different political jurisdictions :.
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The U. Virgin Islands are organised under the Revised Organic Act of the Virgin Islands and have since held five constitutional conventions. In , the population was ,,  with current estimates putting the population at , July , most of whom are of Afro-Caribbean descent. Virgin Islands were originally inhabited by the Ciboney and Arawaks , with some scholars thinking that the islands were inhabited from as early as BC.