Vetta ultra-prominente

Mappa delle cime ultra-prominenti nel mondo

Una vetta ultra-prominente, o Ultra in breve, è una vetta di montagna con una prominenza topografica di 1 500 metri (4 900 ft) o più.[1]

  1. ^ Rob Woodhall, Relative hills on Earth, su rhb.org.uk, TheRelativeHillsofBritain, 18 maggio 2016.
    «Ultra: peaks with a minimum prominence/relative height of 1500m. Steve Fry coined the term Ultra in the USA in the 1980s. His original term was 'ultra major mountain'. There are no Ultra summits in Britain. Hall of Fame entry minimum is 15.»

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