Leviathan Patera
A major cryovolcanic caldera on Neptune's moon Triton.
Leviathan Patera is a large cryovolcanic caldera on Triton, Neptune’s biggest moon. It was first seen by the Voyager 2 probe during its 1989 flyby and sits in Monad Regio, within the western part of Cipango Planum. The caldera measures about 80 kilometers across and could mark the center of one of the largest cryovolcanic structures in the Solar System.
The feature was named after the Leviathan, a sea serpent from Hebrew scripture, and the International Astronomical Union officially approved the name in 1991.
Geologically, Leviathan Patera is a steep-sided depression with several curved scarps, closely resembling terrestrial collapse calderas. Its northern half has a mostly flat floor about 450 meters deep, broken by an irregular plateau. The southern half is taken up by a broad dome roughly 400 meters high, nearly level with the surrounding plains. A high point in the northwestern section rises about 1 kilometer, one of the tallest local elevations. Around the caldera runs a ring of very smooth terrain, carved by outward-facing arcuate alcoves. Nearby lie two major tectonic features, Kraken Catena and Set Catena, suggesting that rifting at the site is closely tied to the caldera’s formation and activity.
Leviathan Patera appears to be the central vent of Cipango Planum, a geologically young plateau built from cryovolcanic material. Eruptions of cryolava from the caldera constructed much of this plateau and the smooth terrain around it. If Cipango Planum is part of the same edifice, Leviathan Patera is the largest known cryovolcano on Triton and among the largest volcanic features in the Solar System. Its eruptive history likely occurred in stages: first, low-viscosity cryolava resurfaced the surrounding plains, giving Cipango Planum its shallow relief; then eruptions became explosive; finally, higher-viscosity material built domes inside the caldera. Little collapse has happened in the caldera’s center, and apparent explosion pits surround a ring fracture.
Quick Facts
- Location
- Monad Regio, Triton
- Peak
- ~1 km
- Diameter
- ~80 km
- Discoverer
- Voyager 2
- Eponym
- Leviathan
Facts from the source article.
Lore & Background
Leviathan Patera was first viewed by the Voyager 2 spacecraft on its flyby of the Neptune system on 25 August 1989. It is named after the biblical Hebrew sea serpent, the Leviathan, and the name was officially approved by the International Astronomical Union (IAU) in 1991. The caldera is a large, steep-sided depression with a number of arcuate scarps, strongly resembling terrestrial collapse calderas on Earth. The northern half of its floor is ~450 metres deep and largely flat, though an irregular plateau interrupts it, while the southern half is occupied by a broad dome ~400 metres high, nearly level with the surrounding plains. The northwestern section hosts a high point approximately 1 kilometre in height, one of the highest points in the local region. Leviathan Patera is surrounded by a ring of very smooth terrain etched by arcuate alcoves facing outward from the caldera center. It sits near two major tectonic features, Kraken Catena and Set Catena, likely indicating its formation and activity are closely linked to rifting at its site.
Reader's Guide
Leviathan Patera appears to be the central vent of a massive, geologically young plateau of cryovolcanic material called Cipango Planum. Eruptions of volatile material termed cryolava from Leviathan Patera constructed much of Cipango Planum's edifice and the smooth terrain immediately surrounding the caldera. Assuming Cipango Planum is part of Leviathan Patera's cryovolcanic edifice, Leviathan Patera is the largest known cryovolcano on Triton and one of the largest volcanic features in the Solar System. Its eruptive history may have occurred in several stages: first erupting low-viscosity cryolava that resurfaced the surrounding plains, eventually transitioning to explosive eruptions, and finally to erupting higher-viscosity material that constructed domes within the caldera. Comparatively little collapse appears to have occurred within the center of Leviathan Patera, and apparent explosion pits surround a ring fracture. The caldera's association with nearby tectonic features suggests that rifting played a key role in its formation and ongoing activity.
Did You Know?
- Leviathan Patera is approximately 80 kilometres (50 miles) in diameter.
- It was discovered by the Voyager 2 spacecraft in 1989.
- The caldera's northwestern section hosts a high point about 1 kilometre (0.62 mi) tall.
- Leviathan Patera may be the center of one of the largest cryovolcanic edifices in the Solar System.
Frequently Asked Questions
What is Leviathan Patera?
Leviathan Patera is a massive cryovolcanic caldera on Triton, the largest moon orbiting Neptune. It is one of the most prominent geological features identified on the moon's surface and may represent the center of one of the biggest cryovolcanic structures known in the Solar System.
Where exactly is Leviathan Patera located on Triton?
The caldera sits within Monad Regio, specifically in the western portion of the broader Cipango Planum region. It is a steep-sided depression characterized by several curved scarps along its rim.
How was Leviathan Patera discovered?
Voyager 2 captured the first images of the feature during its single flyby of the Neptune system on 25 August 1989. No spacecraft has returned to Triton since, so all our knowledge of the caldera comes from that one brief encounter.
What are the key dimensions of Leviathan Patera?
The caldera spans roughly 80 kilometres (about 50 miles) across, with a northern floor sitting around 450 metres below the rim. A southern dome rises approximately 400 metres, while the northwestern high point reaches about 1 kilometre above the surrounding terrain.
How did Leviathan Patera get its name?
The feature was named after the Leviathan, the great sea serpent described in Hebrew scripture. The International Astronomical Union formally approved the designation in 1991 as part of its naming scheme for Triton's surface features.
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