| Description | ||
|---|---|---|
| AFeature | Geographic area distinguishby amount of reflected light | Cydonia |
| Arcus, arcūs | Arc-shaped feature | |
| Catena, catenae | craters | tractus Catena |
| Cavus, cavi | Arc-shaped feature | Peraea Cavus |
| Chaos, chaoses | Aurorae Chaos | |
| Chasma, chasmata | A deep, elongated,ression | Eos Chasma |
| Collis, colles | Small hills or knobs | Tartarus Colles |
| Corona, coronae | Ovoid-shaped feature | |
| Crater, craters | A circular depression | Victoria crater |
| Dorsum, dorsa | Ridge | Eumenides Dorsum |
| Facula, faculae | Bright spot | |
| Farrum, farra | Pancake-like structure, or a row of such structures | |
| Flexus, flexūs | A very low curvilinear ridge with a scalloped pattern | |
| Fluctus, fluctūs | Flow terrain | Tantalus Fluctus |
| Fossa, fossae | Long, narrow depression | Mangala Fossa |
| Insula, insulae | Island (islands), an isolated land area (or group of such areas) surrounded by, or nearly surrounded by, a liquid area (sea or lake). | |
| Labes, labēs | Landslide | |
| Labyrinthus, labyrinthi | Complex of intersecting valleys or ridges. | Noctis Labyrinthus |
| Lacus, lacūs | "Lake" or small plain | Ismenius Lacus |
| Large ringed feature | Cryptic ringed features | |
| Linea, lineae | A dark or bright elongate marking, may be curved or straight | |
| Lingula, lingulae | Extension of plateau having rounded lobate or tongue-like boundaries | Gemina Longula |
| Macula, maculae | Dark spot, may be irregular | |
| Mare, maria | "Sea"; large circular plain | Mare Acidalium |
| Mensa, mensae | A flat-topped prominence with cliff-like edges | |
| Mons, montes | Mountain | Olympus Mons |
| Palus,paludes | "Swamp"; small plain | Cerberus Palus |
| Patera, paterae | An irregular crater, or a complex one with scalloped edges | |
| Planitia, planitiae | Low plain | Utopia Planitia |
| Planum, plana | Plateau or high plain | Daedalia Planum |
| Promontorium, promontoria | Cape"; headland promontoria | |
| Regio, regiones | A large area marked by reflectivity or color distinctions from adjacent areas, or a broad geographic region | Deucalionis Regio |
| Rima, rimae | Fissure | |
| Rupes, rupēs | Scarp | Utopia Rupes |
| Scopulus, scopuli | Lobate or irregular scarp | Oenotria Scopulus |
| Sinus, sinūs | "Bay"; small plain | Aonium Sinus |
| Sulcus, sulci | Subparallel furrows and ridges | |
| Terra, terrae | Extensive land mass | Terra Cimmeria |
| Tessera, tesserae | Tile-like, polygonal terrain | |
| Tholus, tholi | Small domical mountain or hill | Hecatus Tholus |
| Unda, undae | Dunes | Olympia Undae |
| Vallis, valles | Valley | Ares Vallis |
| Vastitas, vastitates | Extensive plain | Vastitas Borealis |
| Virga, virgae | A streak or stripe of color |
