<Ol> <Li> Jan Mayen (Beerenberg, 2277 m (at 71 ° 06 ′ N 08 ° 12 ′ W ﻿ / ﻿ 71.100 ° N 8.200 ° W ﻿ / 71.100; - 8.200), in the Arctic Ocean </Li> <Li> Iceland (Hvannadalshnúkur in the Vatnajökull, 2109.6 m (at 64 ° 01 ′ N 16 ° 41 ′ W ﻿ / ﻿ 64.017 ° N 16.683 ° W ﻿ / 64.017; - 16.683), through which the ridge runs </Li> <Li> Azores (Ponta do Pico or Pico Alto, on Pico Island, 2351 m, (at 38 ° 28 ′ 0" N 28 ° 24 ′ 0" W ﻿ / ﻿ 38.46667 ° N 28.40000 ° W ﻿ / 38.46667; - 28.40000) </Li> <Li> Saint Peter and Paul Rocks (Southwest Rock, 22.5 m, at 00 ° 55 ′ 08" N 29 ° 20 ′ 35" W ﻿ / ﻿ 0.91889 ° N 29.34306 ° W ﻿ / 0.91889; - 29.34306) </Li> </Ol> <Li> Jan Mayen (Beerenberg, 2277 m (at 71 ° 06 ′ N 08 ° 12 ′ W ﻿ / ﻿ 71.100 ° N 8.200 ° W ﻿ / 71.100; - 8.200), in the Arctic Ocean </Li> <Li> Iceland (Hvannadalshnúkur in the Vatnajökull, 2109.6 m (at 64 ° 01 ′ N 16 ° 41 ′ W ﻿ / ﻿ 64.017 ° N 16.683 ° W ﻿ / 64.017; - 16.683), through which the ridge runs </Li> <Li> Azores (Ponta do Pico or Pico Alto, on Pico Island, 2351 m, (at 38 ° 28 ′ 0" N 28 ° 24 ′ 0" W ﻿ / ﻿ 38.46667 ° N 28.40000 ° W ﻿ / 38.46667; - 28.40000) </Li>

Describe and explain the age of materials around the mid-atlantic ridge