Mars ocean hypothesis
The Mars ocean hypothesis states that nearly a third of the surface of Mars was covered by an ocean of liquid water early in the planet’s geologic history. This primordial ocean, dubbed Paleo-Ocean and Oceanus Borealis, would have filled the Vastitas Borealis basin in the northern hemisphere, a region which lies 4–5 km (2.5–3 miles) below the mean planetary elevation, at a time period of approximately 3.8 billion years ago. Evidence for this ocean includes geographic features resembling ancient shorelines, and the chemical properties of the Martian soil and atmosphere. Early Mars would have required a denser atmosphere and warmer climate to allow liquid water to remain at the surface.
History of observational evidence
Features shown by the Viking orbiters in 1976, revealed two possible ancient shorelines near the pole, Arabia and Deuteronilus, each thousands of kilometers long. Several physical features in the present geography of Mars suggest the past existence of a primordial ocean. Networks of gullies that merge into larger channels imply erosion by a liquid agent, and resemble ancient riverbeds on Earth. Enormous channels, 25 km wide and several hundred meters deep, appear to direct flow from underground aquifers in the Southern uplands into the Northern lowlands. Much of the northern hemisphere of Mars is located at a significantly lower elevation than the rest of the planet (the Martian dichotomy), and is unusually flat.
Oceanus
Oceanus (/oʊˈsiːənəs/; Greek: Ὠκεανός Ōkeanós,pronounced [ɔːkeanós]) was a divine figure in classical antiquity, believed by the ancient Greeks and Romans to be the divine personification of the sea, an enormous river encircling the world.
Strictly speaking, Oceanus was the ocean-stream at the Equator in which floated the habitable hemisphere (οἰκουμένη, oikoumene). Thus, the sun rises from the deep-flowing Oceanus in the east and at the end of the day sinks back into the Oceanus in the west. In Greek mythology, this world-ocean was personified as a Titan, a son of Uranus and Gaea. In Hellenistic and Roman mosaics, this Titan was often depicted as having the upper body of a muscular man with a long beard and horns (often represented as the claws of a crab) and the lower body of a serpent (cf. Typhon). On a fragmentary archaic vessel of circa 580 BC (British Museum 1971.11-1.1), among the gods arriving at the wedding of Peleus and the sea-nymph Thetis, is a fish-tailed Oceanus, with a fish in one hand and a serpent in the other, gifts of bounty and prophecy. In Roman mosaics, such as that from Bardo he might carry a steering-oar and cradle a ship.
Casio Oceanus
Casio Oceanus is an elite line of Casio watches designed for both men and women. The line uses technology from both the G-Shock and Waveceptor watch series. Originally available internationally, the Oceanus line has been discontinued in the US in favor of the Casio Edifice line.
Characteristics
All Oceanus watches are known for the following key characteristics:
Oceanus (disambiguation)
Oceanus is the personification of the world-ocean in Greek myth.
Oceanus may also refer to:
People
Ships
Geography
Other
See also
Podcasts:
