The Virgin Islands 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 archipelago is separated from the true Lesser Antilles by the Anegada Passage and from the main island of Puerto Rico by the Virgin Passage.
The islands fall into three different political jurisdictions:
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