Nasa reveals nasa has found evidence that, roughly four billion years ago, an area on mars called arabia, terra experienced thousands of powerful and explosive volcanic eruptions that may have affected the martian climate. This confirms previous theories that mars was once a different place than what it looks like now. Nasa wrote that the super eruptions are the biggest volcanic eruptions ever known and that they were so powerful. They release oceans of dust and toxic gases into the air, blocking out sunlight and changing a planets climate for decades to stay up to date with latest top stories, make sure to subscribe to this youtube channel by clicking the button above this video, they describe their findings In the study, titled stratigraphic evidence for early martian explosive volcanism in arabia, terra, which was published in the journal geophysical research, letters pedestal craters in eastern arabia, terra on mars, image by the hrsc instrument aboard mars, express extending 159 kilometers by 87 kilometers. This image shows a region with an area of about 13 865 sq kilometers, a third of the size of denmark. Massive ancient volcanic eruptions happened on mars in a span of 500 million years. Nasa said that the massive ancient volcanic eruptions happened on arabia, terra in a span of about 500 million years, a time when mars was once a very different place from what it is today. Scientists first noticed seven calderas or giant holes created at volcanic eruption sites at the site. It was previously known to be depressions caused by asteroid impacts, but a 2013 paper proposed another theory of origin for the calderas.
The paper suggests that the depressions were left behind. After super eruptions, wherein a super volcano has blown its stack, released, magma and the rock above collapses in a sort of sinkhole lead author, patrick welley. A geologist at nasas goddard space flight center said that they have read the paper and became interested in making a follow up study. According to fox news, wellie and his team looked for ashs evidence for the super eruptions that occurred billions of years ago in collaboration with volcanologist alexandra mariella novel from johns hopkins physics laboratory. The team continued the work of the previous paper and examined surface minerals in arabia. Terra, they also used images from the compact reconnaissance imaging spectrometer of the mars reconnaissance orbiter to study canyons and craters from hundreds of thousands of miles away from the calderas. A 3d topographic map of the site showed that minerals turned to clay were layered and were exactly where scientists have estimated where they would have fallen. Billions of years ago, the team estimated that over half a dozen of super volcanoes might have erupted every couple million years. Super eruptions might have affected martian climate welly said that each of the super eruptions that happened billions of years ago might have caused a significant impact on the martian climate. According to science alert, they hypothesized that the super volcanoes must have released a gas that made the atmosphere of mars thicker or that could have blocked the sun. Making the planet colder.
Super eruptions are considered to be the most powerful volcanic eruptions that can release volcanic materials of more than 240 cubic miles, one thousand cubic kilometers into the atmosphere and its surrounding terrain. But what baffles scientists now is how arabia, terra could have only one kind of volcano. Nasa said that super eruptions could also happen on earth with the last one happening in sumatra, indonesia, about 76 000 years ago.