Ancient oceans, ice sheets and the hydrological cycle on Mars

  title={Ancient oceans, ice sheets and the hydrological cycle on Mars},
  author={Victor R. Baker and Robert Strom and Virginia C. Gulick and Jeffrey S. Kargel and Goro Komatsu and Vishwas S. Kale},
A variety of anomalous geomorphological features on Mars can be explained by a conceptual scheme involving episodic ocean and ice-sheet formation. The formation of valley networks early in Mars' history is evidence for a long-term hydrological cycle, which may have been associated with the existence of a persistent ocean. Cataclysmic flooding, triggered by extensive Tharsis volcanism, subsequently led to repeated ocean formation and then dissipation on the northern plains, and associated… 

Ancient ocean on Mars supported by global distribution of deltas and valleys

The climate of early Mars could have supported a complex hydrological system. Analysis of ancient deltaic deposits and valley networks reveals the presence of a planet-wide equipotential surface in

Geomorphologic Evidence for Liquid Water

Besides Earth, Mars is the only planet with a record of resurfacing processes and environmental circumstances that indicate the past operation of a hydrologic cycle. However the present-day

A case for ancient evaporite basins on Mars

Observations indicate that a Martian analog to the Earth's salt pans and saline lakes of arid regions may have existed in crater-basins during Mars' early (Noachian) epoch. Terraced and channelized

Oceans on Mars formed early

The geometry of putative ancient shorelines on Mars suggests that these features were deformed by the growth of a massive volcanic region — a finding that has implications for the climate, geology

Volcanism on the Red Planet: Mars

Of all of the planets in the solar system, Mars is the most Earth-like in its geologic characteristics. Like Earth, it has been subjected to exogenic processes, such as impact cratering and erosion


Anomalous aspects of Martian geology are explained by a theory that incorporates the onset and termination of a core dynamo, associated with an early regime of plate tectonics during the first few

A new hypothesis for the origin and redistribution of sulfates in the equatorial region of western Mars

The formation of sulfates on Mars has been under debate since they were identified by several Mars missions starting from the 1970s. We propose that sulfates formed as evaporites in enclosed standing

Water and the evolutionary geological history of Mars

Mars and Earth are the only two planets known to have long histories of dynamical cycling of water through their atmosphere, lithosphere, and cryosphere. Although we have known for thirty years that



Geochemical evolution of the northern Plains of Mars: early hydrosphere, carbonate development, and present morphology.

It is likely that early in Mars' history, abundant liquid water was available. Under a thick (several bars) carbon dioxide atmosphere, this water could have formed an ocean, located primarily in the

Fluvial valleys and martian palaeoclimates

NETWORKS of small fluvial valleys are extensively developed throughout the ancient heavily cratered terrains of Mars1–3. The existence of the valleys has been cited as compelling evidence for a

Channels and valleys on Mars

Tentative conclusions about the origins of channels and valleys on Mars based on the consensus of investigators who have studied the problem are presented. The morphology of outflow channels is

Exobiology and future Mars missions: the search for Mars' earliest biosphere.

  • C. McKay
  • Physics, Geology
    Advances in space research : the official journal of the Committee on Space Research
  • 1986

Ancient hot springs on Mars: Origins and paleoenvironmental significance of small Martian valleys

At least two classes of small valleys (subparallel slope ravines and flat-floored branching valleys) shown on Viking imagery of Mars exhibit spatial relationships to impact structures. Cessation of

Differential aeolian redistribution rates on Mars

THE surface of Mars gives abundant evidence for aeolian activity, including wind-laid dust and ice deposits at the poles that may be several kilometres thick, a vast dune field surrounding the north