Tyrrhena Patera
Encyclopedia
Tyrrhena Patera is the central depression of a large volcano
in the Mare Tyrrhenum quadrangle
of Mars, located at 21.36° south latitude and 253.47° west longitude. It was named after a classical albedo feature name. Pit chains are found at the summit of Tyrrhena Patera. They are formed by collapse of material into underground voids. Since they form chains and concentric fractures that are aligned, they are probably caused by extension of the surface. Volcanic processes made the crust pull apart. Voids were formed, then material fell into them, leaving holes. It is one of the oldest volcanoes on Mars. As a consequence of its old age, Tyrrhena Patera has many radiating gullies on its slope. When it was formed, magma may have gone through frozen ground and then eruped as easily eroded ash, instead of lava flows.
Volcano
2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...
in the Mare Tyrrhenum quadrangle
Mare Tyrrhenum quadrangle
The Mare Tyrrhenum quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey Astrogeology Research Program. The Mare Tyrrhenum quadrangle is also referred to as MC-22 ....
of Mars, located at 21.36° south latitude and 253.47° west longitude. It was named after a classical albedo feature name. Pit chains are found at the summit of Tyrrhena Patera. They are formed by collapse of material into underground voids. Since they form chains and concentric fractures that are aligned, they are probably caused by extension of the surface. Volcanic processes made the crust pull apart. Voids were formed, then material fell into them, leaving holes. It is one of the oldest volcanoes on Mars. As a consequence of its old age, Tyrrhena Patera has many radiating gullies on its slope. When it was formed, magma may have gone through frozen ground and then eruped as easily eroded ash, instead of lava flows.