Step

Name

Location

Length (km)

Plate/Country

1

Chile Rise

35 - 45˚S/76 - 104˚W

2250

Nazca Plate/Antarctic Plate

2

Juan Fernández Ridge

33˚S/76 - 82˚W

900

(3900 m depth)

Volcanic islands and 11 seamount chains on the

Nazca Plate

3

Chile Basin

30 - 32.5˚S/80 - 90˚W

(4800 m depth)

Chile

4

Iquique Ridge

23 - 28˚S/73 - 79˚W

600

Peru-Chile Trench

5

Nazca Ridge

14.5 - 22˚S/76.3 - 82˚W

1000

(200 km wide)

Peru Trench

6

Peru Basin

14˚S/83˚W

(4000 m depth)

Nazca Plate/Peru

7

Ecuador Continental Shelf

(200 m depth)

Nazca Plate/Ecuador

8

Ecuador Insular

Shelf

Nazca Plate/Ecuador

9

Carnegie Ridge

(Galapagos Islands, 13 volcanoes)

0 - 2˚S/81.3 - 85.0˚W

1350

(300 km wide)

(1000 - 3500 m depth)

Ecuador

10

Cocos-Nazca Ridge

2 - 3˚N/94.6 - 96.5˚W

(2000 m depth)

Galapagos

(Cocos-Nazca)

Spreading Center

11

Malpelo Ridge

2 - 5˚N/80 - 81˚W

300 km

(100 km wide)

Carnegie Ridge/Colombia

12

Panama Basin

5˚N/83.3˚W

(3300 m depth)

Surrounded by Panama, Colombia, Ecuador

13

Coiba Ridge

6.3˚N/81.45˚W

150 km

(100 km wide)

Panama

14

Cocos Ridge

2.3 - 8.5˚N/82.8 - 90.3˚W

1000

(200 km wide)

(1000 - 3000 m depth)

Cocos Plate,

Costa Rica

15

Colon Ridge

2˚N/96˚W

Undersea Features

16

Guatemala Basin

6 - 11˚N/87 - 99˚W

(2600 m depth)

Cocos Plate

(Guatemala, El Salvador, Honduras, Nicaragua)

17

Tehuantepec Ridge

13.3˚N/98˚W

(2000 - 4000 m depth)

West Coast Mexico

18

East Pacific Rise

8.5 - 14˚N/104 - 104.5˚W

(200 - 700 m depth)

Gulf of California,

Pacific Plate/

North American Plate/

Cocos Plate