Geographic location
Norwegian Sea
221
Greenland
21
Pacific
16
Mitra
8
Indian
5
Rotunda
4
Fid
3
Mid-Atlantic Ridge
3
Recta
3
Rock X
3
Rugosa
3
Stella
3
Antarctic
2
Gibba
2
Inepta
2
Pond Rock
2
Rockall Plateau
2
Shackleton
2
Sira
2
Alta
1
Antarctic Ocean
1
East Ridge
1
Fairbanks
1
Hayes
1
Italica
1
Keller
1
Kennett
1
Morton
1
Mura
1
Rockall Bank
1
The Antarctic
1
Torta
1
Triton
1