Tag Archives: groundwater

THEMIS: Yuty Crater ejecta

THEMIS Image of the Day, March 26, 2018. Off the image to the right is Yuty Crater, located between Simud and Tiu Valles. The crater ejcta forms the large lobes along the right side of this VIS image. This type … Continue reading

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HiRISE: Ridges near Nirgal Valles

In this observation, we see a set of straight ridges in ancient bedrock near Nirgal Valles. The patterns indicate fractures from tectonic stresses, but how have they been hardened to now stand in positive relief after billions of years of … Continue reading

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HiRISE: Icy layers in craters

Scientists now realize that ice is very common on the Martian surface. It often fills up craters and valleys in the mid-latitudes in older climates, although when it’s covered in dust it can be hard to recognize. Today the climate … Continue reading

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Radar shows thick, porous sediments & no ground ice under Meridiani Planum

New findings reveal deposits on Mars that could be interpreted to be ice-rich may contain little or no ice at all, based on an analysis of radar sounder data for Meridiani Planum — an area on the planet’s equator being … Continue reading

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HRSC: Crashing into martian mud

An impactor smashing into an ice-rich surface gave rise to the complex flow features around this ancient crater on Mars. Impacts of comets and asteroids have shaped the surfaces of rocky planets and moons over the Solar System’s 4.6 billion … Continue reading

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THEMIS: Geo-chaos in Gorgonum

THEMIS Image of the Day, April 27, 2017. Today’s false color image shows part of Gorgonum Chaos, a place where subsurface ice melted, broke through to the surface, and drained away after undermining the ground along fractures. The THEMIS VIS … Continue reading

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Researchers pinpoint watery past on Mars

Researchers from Trinity College Dublin have discovered a patch of land in an ancient valley on Mars that appears to have held water in the not-too-distant past. In doing so, they have pinpointed a prime target to begin searching for past … Continue reading

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THEMIS: When groundwater escapes: Hydaspis Chaos

THEMIS Image of the Day, November 2, 2016. The region of hills and mesas at the top of this VIS image are part of Hydaspis Chaos, a typical area of “chaotic terrain.” Scientists think these form when groundwater under pressure … Continue reading

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THEMIS: Yuty Crater

THEMIS Image of the Day, June 14, 2016. This VIS image shows a small portion of Yuty Crater’s ejecta blanket. The crater is off the image to the right. The lobes of ejecta end in a raised ridge of material; … Continue reading

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Lakes in Noctis Labyrinthus: ancient habitable environments?

Groundwater circulation beneath a massive tectonic rift zone located along the flanks of some the Solar System’s largest volcanic plateaus resulted in the formation more than 3 billion years ago of some the deepest basins on Mars, according to a … Continue reading

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