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U.S. DEPARTMENT OF THE INTERIOR MISCELLANEOUS FIELD STUDIES U.S. GEOLOGICAL SURVEY MAP MF-2324, Version 1.1 154¡E 156¡E 158¡E 160¡E 162¡E 164¡E 166¡E 168¡E 170¡E 172¡E 174¡E

5 0 6 00 6 0 0 0 56 0 54 5400 4 0 0 5

00 4 0

0 0 5 0 58 00 54 00 0 5200 20 6 5 0 0 56 0 0 5 EXPLANATION 0 0 0 5 6 0 0 0 40 6 4 0 0 0 0 5 0 0 0 0 5 60 5 0 0 58 0 0 0 5 0 0 5 0 0 80 2 6 5000 0 6 5 0 4 4 2 0 0 3 0 0 5 0 5 0

0 0 40 00 8 5 0 0 4

0 0 8 58 8 0 4 4 4 0 5 0 0 00 5 5 8 0 0 8 00 0 0 00 5 0 0 4 0 0 4 6 4 000 0 56 4 6 5 0 2 0 Above 0 0 0 0 5 54 2 0 0 8 0 00 6 0 0 0 5 5 0 0 5 0 0 4 0 6 0 0 3 6 0 0 5 4 4800 0 0 2 0 6 2 5 5 0 00 6 0 5 0 0 5 0 0 5 5 3 4 0 0 0 0 0 4 2 0 5 0 5 0 0 to -2000 m 0 0 0 0 8 0 0 5 5 4 40 4 200 0 0 0 6 5 460 00 5 00 5200 3 0 6 0 0 0 00

60 00 54 0 6 0 5 5400 0 0 0 5 0 5000 4600 5 4 -2000 to -4000 m 0 6 60 5 5 5 0 0 4 0 0 0 0 0 0 0 0 0 0 8 0 0 0 6 0 6 6 46 0 5 5000 5 540 0 0 0 0 5 0 0 0 8 60 5 0 6 -4000 to -5000 m

5600

5 0 8 5 0 5

5 0 6 4 5

5 0 5 5 200 4 0 6 --- 8

8 0 0 4 8 5 4400 5 0

60 0 0 0 0 0 5 0 0 0 0 0 0 5 5 0 Wod-En Ion 0 0 4 0 0 6 5 0 4 0 4 0

4 4 -5000 to -6000 m 6 0 0

0 5 0 5 0 5 0 2 0 0 0 5 0 5 5 0 ' 4 5 2 0 0 0 0 2 6 40 0 0 0 0 16¡N 8 0 5 5 0 16¡N 5 0 0 00 0 0 5 56 0 0 6 Greater than -6000 m

6000

5 0 4 0 0 4 0 0 6 0 0 00 0 0

5 0 0 00 00 8 0 2 0 5 4400 0 0 8 0 2 3 0 6000 5 4 4 0 5 00 5 0 5 4 4 0 5 540 5 6 0 4 00 0 4000 0 , in red text 0 5 0 0 3000 0 5 540 2 0 0 5 6 5 0 3 0 5000 0 0 4 2 00 56 0 0 0 0 0 3 00 000 2 0 Islands, in red text 0 5400 6 5

00 0 5 00

6 0 0 2

0 4 6 0 0 0 4

5 0

0 5000 50 0 0 0

00 5400

2 0 0 0 0 4 0 4 4000 0 5 5

0 0 5600 0 0 5 0 5600 , in black text

0 0 0

0 0 6 0 5 500 0 5 0 5 6

5 0 6 0 6 0 0 6 5 5 0 6 0 6 4000 0 0 0 0 0 0 6 5000 5200 5 5 0 5 0 0 0 0 0 0 0 40 Nations, in white text 6 0 54 0 4 0 4 5 0 4 4 5 5000 5200 5 0 4 5 0 800 2 0 4 0 0 0 0 4 0 0 5 0 0 0 0 - - 0 0 4200 0 5 4 0 0 50 0 0 5 0 0 0 4 5 00 Depressions 0 Wod-En Rok 4 5 2 5 0 4 0 0 5 5 4 0 4 4 0 0 0 0 6 0 0 - 0 3 00 0 ' 5 0 0 2 Aean-Kan 0 00 0 0 0 00 56 0 0 0 5 4 6 0 0 Unofficial boundaries of the Exclusive Economic Zones. 58 00 0 0 4 5 5 0 0 5600 5 0 6 0 ' 0 0 00 0 5 0 4 6 6 6 5 5 0 00 Boundaries are equidistant lines between islands of different 5 0 0 42 8 0 5 0 5 0 0 0 4 0 0 4 nations within 200 nautical miles (370 km) of one another or 4 0 0 0 5800 0 0 0 0 0 6 0 4 0 4600 0 6 0 54 0 6 0 - 5 0 0 5 0 0 5 4 arcs constructed with a radius of 200 nautical miles (370 km) 0 0 0 4800 Lomtal 0 0 0 0 0 3 2 00 0 0 4 8 0 5 0 0 5 0 4 0 Bokak 5 6 0 Neen-Koiaak 0 4 0 0 5 8 from emergent parts of islands (Tau Rho Alpha, USGS, oral 62 0 0 6

0 0 0 0 0 0 4800

0

0 0 0 0 5 5 0

' 5 1 0

0

0 5 0 0 0

6 6 6 0 0 3 2 0 0 6 6000 0 6 commun., 1998). 0 0 5 0 0 2 5 - - 0

0 5 5 58 20 5 4 6 0 2 3 0 00 6 0 0 0 0 4800 Woden-Kopakut 4 0 0 0 00 0 0 0 5 2 0 50 0 0 0 0 4000 0 0 00 4 5 0 0 0 0 0 5000 0 4 0 - 0 6 0 000 8 460000 0 5 0 2 0 4 4 4800 00 Lobbadede 00 4 52 00 156 W162W 168 W174W 00 5 0 4 0 2 0 5

3 Lewa 3 0

5 0 4400 0 0 0 5 0 ' 0 6 0

5 40 40 0 0

6 5 6 0 2 4 4400 0 0 5 0 2 5 ' 0 0 3000 4600 0 4 0 0

0 0 4 0 0 0 5 0 0 0 0 0 3 5 5 0 0 0 5 00 30 6 0 200 4 0 5 4 4 0 0 4 0 5 2000 0 0

0 0 5 6 0 5600 0 0 0 0 5 14¡N 14¡N 2 0 0

0 4 0 00 5 5 400 0 60 4 00 5 0 0 0 00 2000 2 4 0 0 0 8 0 6 0 0 5 0 0 5200 0 5 0 0 2 0 0 0 80 0 0 5 4 00 4 0 5 5 8 4 2 0 12 N 0 0 5 0 0 3000 00 0 0 4 6 0 6 0 5400 5 4 00 0 2 4 4 0 4 5 0 3 0 0

6 6 6 0 5 5 0 1 5 0 6 0 0 0 0 0 2000 0 0 0 8 6 60 0 0 0 4 4000 00 6 7 3 4000 Bwewa Kan 4 5 4 0 -- - - - 0 0 0 5 6 6200 0 2 0 N. Laanmojanjan 2 0 5 5 60 30 ' 0 50 60 6000 00 0 0 0 ' 4400 0 8 5 ' 5 6 4 0 0 0 6 5400 0 6 N 8 0 0 5 8 5 0 0 4 4 0 2 00 5 5800 0 0 5 0 4 00 6 6 0 0 -- 4 5 5 4 4 0 0 0 Lojabon-Bar 5 0 0 0 0 0 0 0

2 0 2 0 6 6000

6 0 5400 0 0 4800 62 00 0 ' 0 60 0 0 _ 2 5 0 0 0 5200 5 0 0 0 0 5000 6 0 0 4 0 0 00 0 5 0 0 -- --- 0 INDEX MAP 6000 6 0 3 2 5 0 0 0 0 5 0 5 0 0 5 40 4 0 0 4 0 4 Lokoto-Nornor 6000 0 620 80 0 5 5600 4 5 0 2 00 5 50 0 0 00 0 4 0 500

0 8 0 ' 00 6 58

4 0 0

00 0 0 0 0 0 56 0 0 The index map is labeled with the sources of data keyed to the following 0 0 0 4 0 0 540 5 0 2 2 0 5 8 5 0 0

6 00 3 00 2 0 5200 0 0 4 0 0 numbers: 0 0 4600 -- - - - 4 0 4 5 6 4 0 4 0 8 0 5000 4 0 S. Laanmojanjan 0 4 0 5 0 0 0 0 0 56 2 6 0 0 4 0 8 54 00 5 0 00 ' ' 1, 2, 3, 5, 6: USGS-KORDI 1989 survey F-10-89-CP (digitized 000 50 00 5 6 0 5 Peto-En 4 400 0 0 6 6000 0 0 4 Look 0 0 6 30 0 2 5 1998), Hein and others (1990) 0 0 6 00 0 0 0

5 5 6 0 0 000 ' 4 0 2 0 4 0 5 0 0 0 0 0 1, 4, 7: KORDI-USGS 1997 survey KODOS 97-4, Hein and 0 0 3 6 8 000 0 5 0 5 6 3 0 00 0 0 0 0 62 00 5 0 0 - 000 2 8 0 0 0 2 0 4 0 0 0 5 others (in press) 0 2 0 4 0 2 0 0 - Wodejebato 0 0 6 0 0

4 0 0 5000 0 2 6 4 0 0 5 0

Lo-Wuliej 0 40 Pikaar Atoll

0 0 0 0 2 1, 7: KORDI-USGS 1998 survey KODOS 98-3, Hein and others 0 3 0 0 0 0 5600 4 0 0 0 0 0 0 3 0 Lomilik 0 2 (Sylvania) 0 6 6 4 5000 60 00 5 5 0 '' 5 6 (in press) 0 4 00 5 0 44 42 0 ' 00 6 Lami 5 4000 12¡N 12¡N 000 0 400 8: Chase and others (1984) coastline 0 0 0 4000 5 2 0 6 0 8 6 0 5 0 0 2 0 ' 4 0 4 0 0 0 0 -- -- 0 0 0 0 0 0 40 0 0 0 0 5 0 3000 Ruwituntun 0 4 8 4 5 20 -- Remainder of coastline from GMT (Wessel and Smith, 1995) 6 8 4 00 0 5 5 0 0 0 4 100 Lawun-Pikaar 0 0 0 - 0 0 0 0 0 0 2 Remainder of bathymetric data from Smith and Sandwell (1997) 0 480 5 5 5 0 Lojemeja 4 4 6 5 4 6 0 400 0 0 2 ' 0 00 0 6 0 5 0 0 0 5 0 0 20 4 5 5 0 4 0 8 0 ' 0 -- 0 0 0 0 0 Aeloninae - 5 100 4 - 1 0 4 4 8 0 0 5 Rondik 2 00 Utrok Atoll 0 0 6 - 0 0 0 0 0 DISCUSSION 5 500 Atoll 0 0 0 2000 4 4 0 0 4 Anewetak 0 4 Atoll 0 0 3000 2 8 6 5800 0 5 Radik 00 4 1000 6 6 2 0 0 5 000 5 0 6 0 6 00 6 0 0 0 0 0 4600 2000 0

0 0 Lainjin 0 0 5

4 4 5 Atoll 400 0 5 00 0 This bathymetric map of the Republic of the was 0 0 4 3 0 6 Pikinni Atoll 40 0 0

0 2 4 4

0 6 00 0 0 0 0 0 0 ' 0 0 0 constructed from (1) unpublished data collected during recent surveys 0 2 0 5 2 1 0

5 0 0 0 8 0 0 0 0 0 0 6 0 3000 0 - - 5 conducted by the U.S. Geological Survey (USGS) and the Korean Ocean 4600 60 4600 - Jebo 00 Litormalu Research Development Institute (J.W. Moon and K.Y. Lee; Hein and

46 2 - 0 4 Toke Atoll 0 3 4200

0 6 0 0 0 Ronlap Atoll 0 others, in press), (2) the two-minute gridded satellite altimetry data from 0 0 0 0 4000 0 0 5200 0 4800 0 0 ' 5 Smith and Sandwell (1997), and (3) coastline data from the Generic 4 5 - 400 5 Mapping Tools (GMT) software (Wessel and Smith, 1995) and Chase and 0 Lewonjoui 0 0 0 00 42 0 others (1984). 0 Lo-En (Hess) 4 2 0 5 0 0 Likelep 0 0 6 0 0 4 6 ' Aelok Atoll 0 6 0 0 00 0 5 0 0 4 2 5 0 0 '' 4 5 0 4 2 0 1 5 0 0 0 6 4 5 - 0 0 0 3 0 0 0 0 0 5 0 0 0 5200 0 0 8 3 0 0 These data sets were merged by the following method. The new USGS- Lajutokwa 0 0 3 0 4 2 0 0 Jemo I. 0

0 0

Pali 4 KORDI survey data were desampled to a 250-m spacing. A buffer zone 5 ' 0 60 Republic of the 0 0 0 0 Marshall Islands 0 4500 m to either side of the new data was used to mask out the underlying 0 5 4 - 00 0 0 2 4 1000 8 0 8 4 2 4 2 3 0 4 Wotto 0 4 0 two-minute data. The resulting data sets were combined to construct a 0 - 0 0 5400 0 0 4400

0 1

0 Lalibjet - 0 , Lotab 00 0 0 Atoll 0 0 surface according to the triangular irregular network (TIN) model

0 Majej I. 0 0 4 2 10¡N 5 0 5 10¡N '30 00 supported by ArcInfo. The data were gridded on 1000-m grid cells with a 00 0 2000 60 44 Likiep4 Atoll 400 4 00 0 4 4 0 0 smoothing (quintic) option. Contours were extracted at 200-m intervals. 0 0 2 2000 2 2 2000 0 0 5 0 0 0 2 0 5 5600 0 30 00 1000 0

5200 0 46 - - 0 0 0 500

0 2 0 0 0 0 The spellings of island, atoll, and names follow the 0 5 Wojja Atoll 4 4 Kuwajleen Atoll 5 - 4 5 5000 4400 00 5200 Ujlan Atoll 5000 0 recommendation of the Republic of the Marshall Islands government and 00 0 5 6 - 00 46 0 200 Lemkein 2 5 4000 Ujlan 4 5000 4600 are consistent with those in the Marshallese-English dictionary, including ' 3000 2000 the diacritical marks (Abo and others, 1976). We were provided a list of 0 5 5400 0 3 4 4 2 0 6 0

5 0 0 3000 0 0 0 4 names for the seamounts by Alfred Capelle (Alele Museum and National 8 0 0 0 0 0 0 400 0 4 0 0 Archives, now located at the College of the Marshall Islands), who 0 0 0 5 4 0 3000 0 0 5 4 5 0 5 8 - 5 50 0 2 1

0 0 0 0

4 0 4 0 48 0 0 0 0 1000 00 0 00 2000 solicited those traditional names from village leaders from the various 0 46 4400 0 5 0 Adkup 5200 5 00 4000 5000 42 2000 islands. We applied the appropriate names to seamounts located within 5000 0 00 3000 Ujae 500 50 400 5000 0 Atoll 5 0 0 specifically defined sectors adjacent to the various atolls and islands. The 0 46 0 0 4 Federated States of 00 5 0 8 2 2 Atoll 0 40 4 names are primarily from Marshallese legends and the meaning of each is 0 0 3 2 0 0 0 4 ' ' ' 3 0 0 00 0 0 0 0 5 1000 0 0

0 0 Mij-Lep 2 0 0 0 2 provided by Hein and others (1990). 0 0 0 4 4 5 0 4 00 5 2 5 2 0 200 00 0 0 00 0 5 0 4 --- 0 4 0 0 4 4 5200 0 2 3 Lokkworkwor 4 0 0 5 00 0

42 0

2 0 8 0 0 0 REFERENCES CITED 4 0 Minto 0 0 0

4 ' 0

0 4

0 1 0 0 0

0 0 0 4 0 2 0

4000 0 4 4 2 0 5 0 0 0 8 Nadikdik Abo, Takaji, Bender, Byron W., Capelle, Alfred, and Debrum, Tony, 1976, 4 5 3 0 0 3 0 2000 0 0 0 0 3000 0 00 0 0 3 4 4 0 0 ' 2 Marshallese-English Dictionary: , University Press of 6 0 Atoll 3 0 0 5

0 0 0

4

0 4 4 2000 4 4 , 589 p. 4 6 8 000 8 0 0 Jebat I. 0 5 4 0 8 0 Ellep I. 5 0 0 1 0 5 0 8¡N 0 0 8¡N 4600 2 0 0 0 0 0 0 0 0 0 4 48 Chase, T.E., Seekins, B.A., and Lund, K.E., 1984, Marine physiography of 4 8 00 4

4 8

0 0 00 0 0 the Marshall Islands: unpublished map, scale 1:2.5 million. 3 0 0 5 0 0 0 Litakpooki 5 4 0 0 2 52 0 42 0 0 4 00 0 0 Oroluk Atoll 0 0 3 2 0 5 Hein, J.R., Kang, Jung-Keuk, Schulz, M.S., and others, 1990, Geological, 3000 5 4 0 0 8 0 0 - 0 0 0 0 0 5 0 0 0 geochemical, geophysical, and oceanographic data and 0 0 0 4 0 0 5 1000 0 Lomjenaelik

6 0 0 0 8 0 4 0 2000

5 4 5 3 4

0 0 Jebro 1 0 4 4 2 0 0 0 2 0 6 0 -- interpretations of seamounts and co-rich ferromanganese crusts from 0 0 0 0 ' ' 0 0 0 0 4000 Aelonlaplap ' 0 0 5 4000 4 2 the Marshall Islands, KORDI-USGS R.V. Farnella Cruise F10-89- Pakin 0 '' 0 0 Atoll 2000 0 CP: U.S. Geological Survey Open-File Report 90-407, 245 p. 0 40 Atoll 8 4800 5 4000 4 5000 4800

4 5 4200 4000 4400 0 0 Hein, J.R., Moon, J.W., Lee, K.Y., and others, in press, Co-rich Fe-Mn 0 5 4 0 0 0 0 52 50 0 1000 6 0 0 0 0 0 0 0 0 - 4 0 500 0 0 0 0 crusts from RMI (Leg 1) and hydrothermal/hydrogenetic Fe-Mn 0 8 4 0 Majro Atoll 1000 00 5 4 2 2000 4 4 5 6 deposits from FSM (Leg 2), KODOS 98-3 Cruise, West Pacific: U.S. 0 4 3 4800 0 0 0 0 4 20 4 0 0 80 5 5 4 0 00 4 ' Geological Survey Open-File Report. 0 40 0 0 0 0 0 0 2 Maanjidep 0 0 00 3 4200 5 00 4 0 5

42 0 0 0 8 0 3 0 0

0 0 1000 5 0 0

0 0 0 0

0 0 0 ' 6 4 6 0 0 0 3 4 2000 0 0 --- Smith, W.H.F., and Sandwell, D.T., 1997, Global seafloor topography 0 4 0 0 8 20 5 4 0 Lomolka 0 4 0 from satellite altimetry and ship depth soundings: Science, v. 277, 6 4600 6 0 5400 0 0 0 40 4 48 00 0 0 0 00 '' 00 0 8 no. 5334, p. 1956-1962. 5 5 4 0 Mwokil Atoll 3000 Pohnpei I. 2 0 3000 4 2000 2000 4 Wessel, Paul, and Smith, W.H.F., 1995, The Generic Mapping Tools Pingelap Atoll 8 -- 0 300 0 0 0 0 1 Jalwoj Atoll 2 4 0 (GMT), version 3, technical reference and cookbook: Manoa, 4 0 0 0 0 2 0 0 0

Namoluk Atoll 0 4 0 0 0 SOEST, University of Hawaii, 70 p.

0 0 4 4 0 Mile Atoll 5 4 5 2 0 8 0 0 00 0 0 0 6¡N 0 0 6¡N 0 0 0 1 0 3 00 20 0 0 0 0 0 0 0 0 5 5 0 0 0 0 0 0 4 8 0 0 0 3000 0 4 3 0 4 3 0 4 5 0 00 2 52 0 0 - 0 4 4 00 0 6 8 0 40 0 Ngtik 1000 0 5 ' ' 0 0 0 0 0 Kole I. 0 8 0 00 4200 0 4 2 4 4 2 0 4 6 0 6 Atoll 0 4 0 4 0 0 0 0 0 0 4 0 0 0

0

Namdik 00 400 0 0 4 5 4 5 0 2 0 4 ' 00 6

8 4

0 Atoll 4 Lukunor Atoll 0 0 8 I. 000 0 0 4 0 2

5 1 4 0 0 40 00 60 5 2 0 0 4000 00 0 Olapahd 00 3 4 2 3 0 0 0 0 1 4600 0 00 0 00 20 00 30 4 5 0 20 0 0 0 0 0 42 30 00 4400 0 60 0 4 0

0 0 0 0 0 0 0 4 3 4 42 2 6 4 4 0 0 46 3000 0 4 0 8 1000 00 40 4 0 6 0 0 0

2000 0 Epoon Atoll 0 2 2000 4 4000 0

0 0 0 AREA OF MAP 6 0 0 0 4 4 0 5 0 0 4 0 0 40 0 4 00 2 5000 2 0 4 0 0 4 0 30 2 4 0 0 0 4 Nukuoro Atoll 0 4 4¡N 4¡N 60 0 00 4400 30 4 5000 4200 2 4 00 0 4 00 0 0 4 0 0 0 2 4 0 44 4 4 40 0 0 0 4 00 0 00 0 0 0 0 5 2 4

4 4 0 00 0 00 0 5 40 4 0 200 2 0 4 0 0 4 4 0 4 0 0 4 0 6 0 0 4 0 Atoll 4 1 8 3000 2000 00

4 50 2 0 00 0 154¡E 156¡E 158¡E 160¡E 162¡E 164¡E 166¡E 168¡E 170¡E 172¡E 174¡E

Base from Smith and Sandwell, 1997

Mercator Projection, Central Meridian 165°, SCALE 1:2,000,000 ° (1 inch represents 31.57 miles) This map was printed on an electronic plotter directly from digital files. Dimensional Standard Parallel 10 , WGS84 BATHYMETRY OF THE REPUBLIC OF THE MARSHALL ISLANDS AND VICINITY calibration may vary between electronic plotters and between X and Y directions on the 50 0 50 100 150 KILOMETERS same plotter, and paper may change size due to atmospheric conditions; therefore, scale and proportions may not be true on plots of this map. NOTE: THIS MAP IS NOT INTENDED FOR NAVIGATION 50 0 50 100 STATUTE MILES By For sale by U.S. Geological Survey, Map Distribution, Box 25286, Federal Center, Denver, CO 80225, 1-888-ASK-USGS BATHYMETRIC CONTOUR INTERVAL 200 METERS James R. Hein, Florence L. Wong, and Dan L. Mosier Available on Wide Web at http://geopubs.wr.usgs.gov/data.html

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