Following are the longest, widest, and deepest rifts and valleys in various worlds of the Solar System.
| World | Rift/Valley | Length | Max. width | Max. depth | class=unsortable | Notes |
|---|---|---|---|---|---|---|
| Venus | Baltis Vallis | NaNmilesNaNmiles | NaNmilesNaNmiles | A lava channel | ||
| Earth | Atlantic Ocean | ≈NaNmilesNaNmiles | ≈NaNmilesNaNmiles | NaNmilesNaNmiles | Length taken to be that of the Mid-Atlantic Ridge. (The ridge also has a secondary rift valley running its length.) The width is an average taken along the spreading ridges (Georgia–Senegal, Brazil – Bight of Benin, etc.). The greatest depth is the Romanche Trench. (The Puerto Rico Trench is not part of the rift system.) | |
| Great Rift Valley | NaNmilesNaNmiles | NaNmilesNaNmiles | NaNmilesNaNmiles | Width and depth are those of the Red Sea Rift, discounting continental shelves < 200 m deep. (These may not be the extremes of the whole rift system.) Length of the Red Sea section NaNmilesNaNmiles. | ||
| Canadian Arctic Rift System | NaNmilesNaNmiles | A northwesterly continuation of the Mid-Atlantic Ridge. | ||||
| West Antarctic Rift System | ||||||
| Midcontinent Rift System | NaNmilesNaNmiles | NaNmilesNaNmiles | NaNmilesNaNmiles | Width & depth Isle Royale – Keweenaw Peninsula; may not be widest point. | ||
| Grand Canyon | NaNmilesNaNmiles | NaNmilesNaNmiles | NaNmilesNaNmiles | |||
| Colca Canyon | NaNmilesNaNmiles | |||||
| Cotahuasi Canyon | NaNmilesNaNmiles | |||||
| Moon | Vallis Snellius | NaNmilesNaNmiles | ≈ NaNmilesNaNmiles? | Width assumed to be approx. that of Vallis Rheita | ||
| Mars | Valles Marineris | NaNmilesNaNmiles | NaNmilesNaNmiles | NaNmilesNaNmiles | ||
| Kasei Valles | NaNmilesNaNmiles | NaNmilesNaNmiles | 2–3 km | |||
| Tiu Valles | NaNmilesNaNmiles | |||||
| Ares Vallis | NaNmilesNaNmiles | |||||
| Vesta | equatorial channels | Possibly up to NaNmilesNaNmiles | Length may be as much as the 1790-km circumference of Vesta | |||
| Divalia Fossae | approx. NaNmilesNaNmiles | ≈ 22 km | Compression fracture from Rheasilvia | |||
| Saturnalia Fossae | at least NaNmilesNaNmiles | ≈ 39 km | 365 km visible at one point; rest in northern shadow.https://web.archive.org/web/20140203074541/https://gsa.confex.com/gsa/2012AM/finalprogram/abstract_209151.htm Compression fracture from Veneneia. | |||
| Europa | ? | ? | More than NaNmilesNaNmiles | Moon of Jupiter | ||
| Tethys | Ithaca Chasma | NaNmilesNaNmiles | NaNmilesNaNmiles | 3–5 km (2–3 mi) | Moon of Saturn. Ithaca span approx. 75% the circumference of the Moon. | |
| Charon | Argo Chasma | 700 km (430 mi) | ? | 9 km (6 mi) | Moon of Pluto. Part of a belt of grabens that span most of the circumference of the moon. Only a section was seen on limb of Charon and so exact length uncertain. Not yet officially named.[1] | |
| Caleuche Chasma | ? | Depth estimated in the range .[2] | ||||
| Miranda | tectonic grabens | 20 km | 10-20 km | Extensive series of grabens and scarps that cover most of the moon. | ||
| Titania | Messina Chasma | 1492 km (900 mi) | 50 km (30 mi) | 2-5 km | Geologically young belt of grabens that cut through craters. Bright, icy material exposed on canyon walls. | |
| Sleipnir Fossa | 580 km (360 mi) | 5-10 km | ≈3 km (2 mi) | One of the six extensional "spider" fractures, cuts through Tartarus Dorsa . Not yet officially named. | ||
| Lowell Regio canyons | ≈200 km (120 mi) | 75 km (45 mi) | ≈3-4 km | A series of canyons found very close to the north pole. Not yet officially named. | ||