# List of geological features on Iapetus

Most Iapetian geological features are named after characters and locations in the Old French epic poem The Song of Roland, specifically the English translation by Dorothy L. Sayers.

## Montes

A mons /ˈmɒnz/, pl. montes /ˈmɒntiːz/, is a mountain.
| Name | Coordinates | Diameter (km) | Approval Date | Namesake | Pronunciation | Refs |
| Carcassone Montes | 0°00′N 216°42′W﻿ / ﻿0.0°N 216.7°W﻿ / 0.0; -216.7 | 740.0 | August 5, 2008 | Carcassonne, France | /kɑːrkəˈsoʊn/ | WGPSN |
| Cordova Mons | 0°00′N 206°12′W﻿ / ﻿0.0°N 206.2°W﻿ / 0.0; -206.2 | 85.0 | August 5, 2008 | Córdoba, Spain | /ˈkɔːrdoʊvə/ | WGPSN |
| Gayne Mons | 0°00′N 176°00′W﻿ / ﻿0.0°N 176.0°W﻿ / 0.0; -176.0 | 65.0 | August 5, 2008 | Gayne, Spain | | WGPSN |
| Haltile Mons | 0°00′N 190°24′W﻿ / ﻿0.0°N 190.4°W﻿ / 0.0; -190.4 | 45.0 | August 5, 2008 | Haltile, Spain | | WGPSN |
| Seville Mons | 0°00′N 346°18′W﻿ / ﻿0.0°N 346.3°W﻿ / 0.0; -346.3 | 69.0 | August 5, 2008 | Seville, Spain | /sɪˈvɪl/ | WGPSN |
| Sorence Mons | 0°00′N 193°42′W﻿ / ﻿0.0°N 193.7°W﻿ / 0.0; -193.7 | 46.0 | August 5, 2008 | Castle of Pinabel | | WGPSN |
| Toledo Montes | 0°00′N 136°00′W﻿ / ﻿0.0°N 136.0°W﻿ / 0.0; -136.0 | 1100.0 | August 5, 2008 | Toledo, Spain | /toʊˈliːdoʊ/ | WGPSN |
| Tortelosa Montes | 0°00′N 64°42′W﻿ / ﻿0.0°N 64.7°W﻿ / 0.0; -64.7 | 294.0 | August 5, 2008 | Tortelosa, Spain | | WGPSN |
| Valterne Mons | 0°00′N 170°36′W﻿ / ﻿0.0°N 170.6°W﻿ / 0.0; -170.6 | 50.0 | August 5, 2008 | Valterne, Spain | | WGPSN |

## Regiones

There is one named Iapetian regio /ˈriːdʒioʊ/ (area of distinct albedo difference), Cassini:
| Name | Coordinates | Diameter (km) | Approval Date | Namesake | Pronunciation | Refs |
| Cassini Regio | 28°06′S 92°36′W﻿ / ﻿28.1°S 92.6°W﻿ / -28.1; -92.6﻿ (Cassini Regio) | 0 | 1982 | Giovanni Cassini, discoverer of Iapetus | /kəˈsiːnɪ/ | WGPSN |

## Terrae

There are two named Iapetian terrae /ˈtɛriː/ (large 'land' masses).
| Name | Coordinates | Diameter (km) | Approval Date | Namesake | Pronunciation | Refs |
| Roncevaux Terra | 37°00′N 239°30′W﻿ / ﻿37.0°N 239.5°W﻿ / 37.0; -239.5 | 1284.0 | 1982 | Battle of Roncevaux Pass | /rɒnsəˈvoʊ/ | WGPSN |
| Saragossa Terra | 45°00′S 180°00′W﻿ / ﻿45.0°S 180.0°W﻿ / -45.0; -180.0 | 2300.0 | August 5, 2008 | Saragossa, Spain | /særəˈɡɒsə/ | WGPSN |
The adjectival form of Roncevaux is Roncesvallian.

## Craters

Named impact craters are:
| Name | Coordinates | Diameter (km) | Approval Date | Namesake | Pronunciation | Refs |
| Abisme | 37°32′N 267°05′W﻿ / ﻿37.53°N 267.08°W﻿ / 37.53; -267.08 | 767.74 | August 16, 2013 | A Saracen lord, killed by Archbishop Turpin | | WGPSN |
| Acelin | 42°42′N 154°54′W﻿ / ﻿42.7°N 154.9°W﻿ / 42.7; -154.9 | 38.0 | August 5, 2008 | Aceline of Gascony | | WGPSN |
| Adelroth | 6°36′N 183°36′W﻿ / ﻿6.6°N 183.6°W﻿ / 6.6; -183.6 | 57.0 | August 5, 2008 | Marsilion's nephew | | WGPSN |
| Almeric | 53°24′N 276°00′W﻿ / ﻿53.4°N 276.0°W﻿ / 53.4; -276.0 | 43.0 | 1982 | Almeric, one of the Twelve Peers | | WGPSN |
| Anseïs | 40°42′S 290°48′W﻿ / ﻿40.7°S 290.8°W﻿ / -40.7; -290.8 | 48.0 | August 5, 2008 | One of the Twelve Peers | | WGPSN |
| Astor | 14°54′N 321°12′W﻿ / ﻿14.9°N 321.2°W﻿ / 14.9; -321.2 | 122.0 | August 5, 2008 | A French baron | | WGPSN |
| Baligant | 16°24′N 224°54′W﻿ / ﻿16.4°N 224.9°W﻿ / 16.4; -224.9 | 66.0 | 1982 | Baligant | | WGPSN |
| Basan | 33°18′N 194°42′W﻿ / ﻿33.3°N 194.7°W﻿ / 33.3; -194.7 | 76.0 | 1982 | Bason | | WGPSN |
| Basbrun | 52°00′S 111°48′W﻿ / ﻿52.0°S 111.8°W﻿ / -52.0; -111.8 | 80.0 | August 5, 2008 | Charlemagne's officer | | WGPSN |
| Basile | 0°42′S 187°54′W﻿ / ﻿0.7°S 187.9°W﻿ / -0.7; -187.9 | 6.0 | August 5, 2008 | French baron | | WGPSN |
| Berenger | 62°06′N 219°42′W﻿ / ﻿62.1°N 219.7°W﻿ / 62.1; -219.7 | 84.0 | 1982 | Bérengier | | WGPSN |
| Besgun | 76°00′N 309°48′W﻿ / ﻿76.0°N 309.8°W﻿ / 76.0; -309.8 | 56.0 | 1982 | Besgun | | WGPSN |
| Bevon | 70°42′N 93°00′W﻿ / ﻿70.7°N 93.0°W﻿ / 70.7; -93.0 | 48.0 | August 5, 2008 | French baron | | WGPSN |
| Bramimond | 38°00′N 178°00′W﻿ / ﻿38.0°N 178.0°W﻿ / 38.0; -178.0 | 200.0 | August 5, 2008 | Bramimonde | | WGPSN |
| Charlemagne | 55°00′N 258°48′W﻿ / ﻿55.0°N 258.8°W﻿ / 55.0; -258.8 | 95.0 | 1982 | Charlemagne | /ˈʃɑːrlɪmeɪn/ | WGPSN |
| Clarin | 18°18′N 71°36′W﻿ / ﻿18.3°N 71.6°W﻿ / 18.3; -71.6 | 84.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Climborin | 30°24′N 116°54′W﻿ / ﻿30.4°N 116.9°W﻿ / 30.4; -116.9 | 49.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Corsablis | 0°54′N 114°12′W﻿ / ﻿0.9°N 114.2°W﻿ / 0.9; -114.2 | 73.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Dapamort | 36°36′N 84°54′W﻿ / ﻿36.6°N 84.9°W﻿ / 36.6; -84.9 | 49.0 | August 5, 2008 | Saracen king | | WGPSN |
| Engelier | 40°30′S 264°42′W﻿ / ﻿40.5°S 264.7°W﻿ / -40.5; -264.7 | 504.0 | August 5, 2008 | One of the Twelve Peers | | WGPSN |
| Escremiz | 1°36′N 173°30′W﻿ / ﻿1.6°N 173.5°W﻿ / 1.6; -173.5 | 0.06 | August 5, 2008 | Escremiz of Valterne | | WGPSN |
| Eudropin | 0°54′N 220°42′W﻿ / ﻿0.9°N 220.7°W﻿ / 0.9; -220.7 | 42.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Falsaron | 33°48′N 82°36′W﻿ / ﻿33.8°N 82.6°W﻿ / 33.8; -82.6 | 424.0 | August 5, 2008 | Brother of King Marsilion | | WGPSN |
| Ganelon | 44°18′S 19°48′W﻿ / ﻿44.3°S 19.8°W﻿ / -44.3; -19.8 | 230.0 | August 5, 2008 | Ganelon | | WGPSN |
| Garlon | 3°12′S 240°30′W﻿ / ﻿3.2°S 240.5°W﻿ / -3.2; -240.5 | 47.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Geboin | 58°36′N 173°24′W﻿ / ﻿58.6°N 173.4°W﻿ / 58.6; -173.4 | 81.0 | 1982 | Geboin | | WGPSN |
| Gerin | 45°36′S 233°00′W﻿ / ﻿45.6°S 233.0°W﻿ / -45.6; -233.0 | 445.0 | August 5, 2008 | One of the Twelve Peers | | WGPSN |
| Godefroy | 71°54′N 249°06′W﻿ / ﻿71.9°N 249.1°W﻿ / 71.9; -249.1 | 63.0 | 1982 | Godefroy | | WGPSN |
| Grandoyne | 17°42′N 214°30′W﻿ / ﻿17.7°N 214.5°W﻿ / 17.7; -214.5 | 65.0 | 1982 | Grandoyne | | WGPSN |
| Hamon | 10°36′N 270°00′W﻿ / ﻿10.6°N 270.0°W﻿ / 10.6; -270.0 | 96.0 | 1982 | Hamon | | WGPSN |
| Ivon | 18°00′N 315°00′W﻿ / ﻿18.0°N 315.0°W﻿ / 18.0; -315.0 | 100.0 | August 5, 2008 | One of the Twelve Peers | | WGPSN |
| Johun | 12°24′N 83°24′W﻿ / ﻿12.4°N 83.4°W﻿ / 12.4; -83.4 | 64.0 | August 5, 2008 | Johun of Outremer; Saracen lord | | WGPSN |
| Jurfaleu | 13°00′N 2°30′W﻿ / ﻿13.0°N 2.5°W﻿ / 13.0; -2.5 | 107.0 | August 5, 2008 | Son of Marsilion | | WGPSN |
| Lorant | 65°12′N 159°48′W﻿ / ﻿65.2°N 159.8°W﻿ / 65.2; -159.8 | 44.0 | 1982 | Lorant | | WGPSN |
| Malprimis | 15°12′S 118°12′W﻿ / ﻿15.2°S 118.2°W﻿ / -15.2; -118.2 | 377.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Malun | 5°54′N 41°18′W﻿ / ﻿5.9°N 41.3°W﻿ / 5.9; -41.3 | 121.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Margaris | 27°42′N 135°48′W﻿ / ﻿27.7°N 135.8°W﻿ / 27.7; -135.8 | 75.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Marsilion | 39°12′N 176°06′W﻿ / ﻿39.2°N 176.1°W﻿ / 39.2; -176.1 | 136.0 | 1982 | Marsilion | /mɑːrˈsɪliən/ | WGPSN |
| Matthay | 3°30′S 187°24′W﻿ / ﻿3.5°S 187.4°W﻿ / -3.5; -187.4 | 58.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Milon | 67°54′N 207°12′W﻿ / ﻿67.9°N 207.2°W﻿ / 67.9; -207.2 | 119.0 | 1982 | Milon | | WGPSN |
| Naimon | 9°18′N 329°18′W﻿ / ﻿9.3°N 329.3°W﻿ / 9.3; -329.3 | 244.0 | August 5, 2008 | Naimon | | WGPSN |
| Nevelon | 33°12′S 197°00′W﻿ / ﻿33.2°S 197.0°W﻿ / -33.2; -197.0 | 49.0 | August 5, 2008 | Shares command of Charlemagne's sixth division | | WGPSN |
| Ogier | 42°30′N 275°06′W﻿ / ﻿42.5°N 275.1°W﻿ / 42.5; -275.1 | 100.0 | 1982 | Ogier the Dane | | WGPSN |
| Oliver | 62°30′N 200°48′W﻿ / ﻿62.5°N 200.8°W﻿ / 62.5; -200.8 | 113.0 | 1982 | Olivier | /ˈɒlɪvər/ | WGPSN |
| Othon | 33°18′N 347°48′W﻿ / ﻿33.3°N 347.8°W﻿ / 33.3; -347.8 | 86.0 | 1982 | Othon | | WGPSN |
| Pinabel | 39°00′S 33°00′W﻿ / ﻿39.0°S 33.0°W﻿ / -39.0; -33.0 | 83.0 | August 5, 2008 | Pinabel | | WGPSN |
| Priamon | 1°30′N 187°00′W﻿ / ﻿1.5°N 187.0°W﻿ / 1.5; -187.0 | 17.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Rabel | 64°24′S 166°12′W﻿ / ﻿64.4°S 166.2°W﻿ / -64.4; -166.2 | 91.0 | August 5, 2008 | French baron | /ˈræbəl/ | WGPSN |
| Roland | 73°18′N 25°12′W﻿ / ﻿73.3°N 25.2°W﻿ / 73.3; -25.2 | 144.0 | 1982 | Roland | /ˈroʊlənd/ | WGPSN |
| Rugis | 0°06′S 99°00′W﻿ / ﻿0.1°S 99.0°W﻿ / -0.1; -99.0 | 19.0 | August 5, 2008 | Saracen lord | /ˈruːdʒɪs/ | WGPSN |
| Samson | 6°30′N 298°36′W﻿ / ﻿6.5°N 298.6°W﻿ / 6.5; -298.6 | 33.0 | August 5, 2008 | One of the Twelve Peers | /ˈsæmsən/ | WGPSN |
| Thierry | 55°00′S 8°00′W﻿ / ﻿55.0°S 8.0°W﻿ / -55.0; -8.0 | 110.0 | August 5, 2008 | French knight, friend of Roland | | WGPSN |
| Tibbald | 57°00′N 358°00′W﻿ / ﻿57.0°N 358.0°W﻿ / 57.0; -358.0 | 160.0 | August 5, 2008 | Tibbald of Reims | /ˈtɪbəld/ | WGPSN |
| Timozel | 9°54′S 212°18′W﻿ / ﻿9.9°S 212.3°W﻿ / -9.9; -212.3 | 58.0 | August 5, 2008 | Saracen lord | | WGPSN |
| Torleu | 0°12′S 188°24′W﻿ / ﻿0.2°S 188.4°W﻿ / -0.2; -188.4 | 8.0 | August 5, 2008 | Leader in Baligant's army | | WGPSN |
| Turgis | 16°54′N 28°24′W﻿ / ﻿16.9°N 28.4°W﻿ / 16.9; -28.4 | 580.0 | August 5, 2008 | Saracen baron | /ˈtɜːrdʒɪs/ | WGPSN |
| Turpin | 47°42′N 1°24′W﻿ / ﻿47.7°N 1.4°W﻿ / 47.7; -1.4 | 87.0 | 1982 | Turpin | /ˈtɜːrpɪn/ | WGPSN |
| Valdebron | 29°36′N 104°24′W﻿ / ﻿29.6°N 104.4°W﻿ / 29.6; -104.4 | 49.0 | August 5, 2008 | Saracen lord | | WGPSN |