NASA’s Curiosity Rover is now directly observing a Martian region that was previously visible only from orbit. This area exhibits a distinctive "boxwork" formation, as well as signs of ancient water bodies such as rivers, lakes, and possibly even an ocean.
Images and information obtained from the Mars rover have sparked queries regarding the transformation of the Red Planet's landscape billions of years past. Despite these insights, scientists haven’t yet unraveled the mystery behind what caused the planet’s water to vanish, turning its surface into an icy wasteland.
The Curiosity rover is located in an area known as Gale Crater, where findings have indicated that water flowed beneath the surface at the time of its formation.
NASA stated that the rover discovered indications of groundwater within the crater during its observation of intersecting small ridges, with some features standing less than a few inches high. Geologists characterized these formations as exhibiting a boxwork arrangement.
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Underneath the ridges lies bedrock which scientists think was formed when groundwater trickled Through the rock, leftover minerals gathered within the crevices and fractures. These minerals subsequently solidified, taking on a cement-like consistency.
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The structures have been eroded over time through eons of sandblasting caused by Mars' winds, as stated by NASA. Despite this erosion, the minerals persisted and exposed an intricate system of sturdy ridgelines underneath.
Rover has previously examined ridges that experts believe resemble a deteriorating sidewalk.
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However, the patterns formed over time extend for miles along a layer on the 3-mile-high Mount Sharp. The rover has been ascending the lower slopes of these foothills. Mount Sharp since 2014, NASA said.
Scientists are intrigued by the boxwork patterns because these formations have not been observed elsewhere on the mountain by orbiting spacecraft or detected by the Curiosity rover.
"A major puzzle lies in understanding why the ridges have been reinforced into such large formations and why this phenomenon occurs exclusively at this location,” explained Ashwin Vasavada, the Curiosity project scientist from NASA’s Jet Propulsion Laboratory located in Southern California. “As we continue our journey, we will analyze both the ridges and their mineral fillings to ensure our theory about their formation aligns with reality.”
NASA mentioned that these patterns appear in sections of Mount Sharp that were shaped throughout different periods of early Martian history. Therefore, as the rover climbs from lower levels representing older epochs to higher strata indicating more recent ones, it is effectively journeying through time and looking for evidence of past water presence on Mars along with conditions favorable for sustaining microscopic life forms back then.
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NASA stated, “The rover is presently examining a stratum rich in saline compounds known as magnesium sulfates, which develop when water evaporates.” They further noted, “This layer’s existence indicates that the area grew more arid over time.” Interestingly, the boxwork structures reveal that despite these drying conditions, groundwater persisted beneath the surface, leading to alterations visible today.
Newly discovered hints from Mars could offer extra understanding for researchers about the reasons behind the formation of these boxwork patterns in their specific locations.
The foundation beneath the ridges contains numerous small fissures filled with white streaks of calcium sulfate, according to NASA. This substance forms as groundwater seeps into rock crevices, leaving behind salts. The same kind of veins were abundant in the lower sections of the mountain, including one laced with clay. However, these types of veins have not previously been observed within the sulfates.
“That’s genuinely astonishing,” remarked Abigail Fraeman, the deputy project scientist for Curiosity at JPL. “We previously encountered these calcium sulfate veins ubiquitously, yet they largely vanished when ascending further up Mount Sharp. It has piqued our interest greatly to uncover the reason behind their reappearance.”
The Curiosity rover was launched on November 26, 2011, and touched down on Mars on August 5, 2012. Its objective was to investigate whether Mars Has ever possessed suitable environmental circumstances for supporting life, and initially, the rover found chemical and mineral proof of inhabitable environments from earlier times.
Original article source: NASA's Curiosity rover uncovers strange 'boxwork' structures on Mars connected to past water activity.