Pororoca

The Pororoca (Portuguese pronunciation: [pɔɾɔˈɾɔkɐ], [poɾoˈɾɔkɐ]) is a tidal bore, with waves up to 4 m (13 ft) high that travel as much as 800 km (500 mi) inland upstream on the Amazon River and adjacent rivers. Its name might come from the indigenous Tupi language, where it could translate into "great roar". It could be also a Portuguese version of the term poroc-poroc, which in an indigenous' language was a way of expressing the act of destroying everything.^[1] It could be also a portmanteau of the words poroc (to take out, to tear away) and oca (house).^[1] It occurs at the mouth of the river where its waters meet the Atlantic Ocean.

^ ^a ^b Nossa, Leonencio (2011). "63". O Rio - Uma Viagem Pela Alma do Amazonas (in Portuguese). Rio de Janeiro: Editora Record. p. 339. ISBN 978-85-01-09526-8.

[o_rio-1] Nossa, Leonencio (2011). "63". O Rio - Uma Viagem Pela Alma do Amazonas (in Portuguese). Rio de Janeiro: Editora Record. p. 339. ISBN 978-85-01-09526-8.

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