Ancient ocean on Mars
Nature Geoscience
2010년6월14일
More than three billion years ago, the northern lowlands of Mars were covered by a vast ocean, suggests a study online this week in Nature Geoscience. Although previous spacecraft investigations have pointed to the possible presence of an ancient ocean on Mars, this past evidence has been uncertain.Gaetano Di Achille and Bryan Hynek analysed the distribution of ancient delta deposits and river-valley networks on Mars. Their investigations indicate that many of the deltas sit at a similar elevation. The authors suggest that these deltas ring an ancient shoreline, providing strong support for a vast and ancient ocean in the northern plains of Mars.
The elevation of the newly proposed shoreline is also consistent with the outlets of ancient river-valley networks, indicative of a globally uniform water level on ancient Mars.
doi: 10.1038/ngeo891
리서치 하이라이트
-
6월16일
Environment: EU agricultural imports vulnerable to future climate changeNature Communications
-
6월15일
Climate change: Tailored online messaging shifts Republican voters' understanding of climate changeNature Climate Change
-
6월11일
Ecology: Coral reefs could stop net growth by mid-21st centuryCommunications Earth＆Environment
-
6월8일
Economics: 27% of global food expenditure reaches farmersNature Food
-
6월3일
Environment: Temperate lake oxygen levels in declineNature
-
6월1일
Climate change: Heat-related human mortality from anthropogenic climate change assessedNature Climate Change
