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This is a list of named geological features on Tethys. Tethysian geological features are named after people and places in The Iliad and The Odyssey.
There is one named chasm on Tethys.
| Chasma | Named after |
| Ithaca Chasma | Ithaca |
| Crater | Named after |
| Ajax | Ajax the great |
| Anticlea | Anticlea |
| Antinous | Antinous |
| Arete | Arete |
| Circe | Circe |
| Elpenor | Elpenor |
| Eumaeus | Eumaeus |
| Eurycleia | Eurycleia |
| Laertes | Laertes |
| Melanthius | Melanthius |
| Mentor | Mentor |
| Nausicaa | Nausicaa |
| Nestor | Nestor |
| Odysseus | Odysseus |
| Penelope | Penelope |
| Phemius | Phemius |
| Polyphemus | Polyphemus |
| Teiresias | Tiresias |
| Telemachus | Telemachus |