Impact crater Mars tsunamis theory

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Even if this idea of ancient Martian tsunami lost its reliability in recent times, some researchers still claim that many billion years ago an ocean may have filled the vast lowland region of Mars' northern parts.

It's not the first time the unusual sphere has been spotted on the surface of Mars this year. They have modeled a system about the waters on Mars would propagate.

NASA announced in 2015 that Mars once was home to an ocean that held an estimated 20 million cubic kilometers (12.4 million cubic miles) of water, which is more than is found in the Arctic Ocean. This further fuels hopes of finding signs of biology on the planet.

In the latest study, the team of researchers was able to identify a group of lobate deposits that are usually linked with Mars' water movements.

Geophysics professor Francois Costard said: "We found typical tsunami deposits along the dichotomy between the northern hemisphere and southern hemisphere of Mars". Also, the fact that the location of these deposits was the dichotomy between the northern and southern hemisphere only supports the hypothesis of the existence of a northern sea located in Mars, Costard said to BBC this Sunday.

"There's also a second set of landforms that we see along the coastline called thumbprint terrain... the reflection of the tsunami waves from the coast, and their interaction with the second set of tsunami waves, predicted by the numerical modeling, would have resulted in sediment deposition that's very similar to what we actually observe on Mars", he noted.

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If it is true that an ocean existed on the red planet billions of years ago, it could have produced a more life-supporting Mars today. Knowing more about it could hasten the planned trip to Mars in a few years time.

"It was a really large-scalehigh-speeded tsunami", Dr. Costard explained, according to the Christian Science Monitor. At the very beginning, a crater of 70km in diameter was created by the impact. This expelled a huge volume of water, with wave propagation at 60 meters per second [134 miles per hour].

The impact crater responsible for the two giant tsunami waves is a 120km wide bowl named Lomonosov respectfully named after Mikhail Vasilyevich Lomonosov a Russian polymath from the 18th century. Furthermore, they estimate that at least one wave measuring 300 meters (nearly 1,000 feet) tall deposited a great amount of sediment in that region, and it was all caused by an asteroid impact - or perhaps more.

One particularly interesting spot on the planet, which NASA describes as "thumbprint-looking", was long thought to be the result of mud or other debris sliding downward after being pushed up by a glacier or other geographical shift.

The odd sphere is not the first to be spotted on Mars's surface this year.

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