Сырт - Льюис Кэрролл был прав
Ру-Википедия называет возвышенностью сырт на высоте 300-350 метров, а сырт на высоте 3-4 километров называет равниной.
'When you say "hill,"' the Queen interrupted, 'I could show you hills, in comparison with which you'd call that a valley.' - 'No, I shouldn't,' said Alice, surprised into contradicting her at last: 'a hill can't be a valley, you know. That would be nonsense.' (ц)
'When you say "hill,"' the Queen interrupted, 'I could show you hills, in comparison with which you'd call that a valley.' - 'No, I shouldn't,' said Alice, surprised into contradicting her at last: 'a hill can't be a valley, you know. That would be nonsense.' (ц)