NASA has discovered another massive crater beneath the ice in Greenland

Rodiano Bonacci
Febbraio 12, 2019

A NASA glaciologist spotted signs of the possible crater in northwest Greenland just 114 miles from the recently-discovered crater beneath the Hiawatha Glacier while scouring satellite imagery and topographic maps of the area.

The researcher analyzed images from the Moderate Resolution Imaging Spectroradiometer instruments on NASA's Terra and Aqua satellites along with those from NASA's Operation IceBridge and discovered what appeared to be a bowl-shaped depression in the bedrock.

Before the discovery of the Hiawatha impact crater (see video below), scientists generally assumed that most evidence of past impacts in Greenland and Antarctica would have been wiped away by unrelenting erosion by the overlying ice. From the same radar data and ice cores that had been collected nearby, MacGregor and his colleagues determined that the ice in the area was at least 79,000 years old. "Do the underlying data support that idea?"' MacGregor said.

Despite the close proximity of the two features, scientists believe that even if both were formed by meteorites striking Earth, they were likely created separately.

The suspected crater is estimated to be 22.7 miles wide.

Joe MacGregor, a glaciologist with NASA's Goddard Space Flight Center in Greenbelt, Maryland, who participated in both findings, said: "I began asking myself 'Is this another impact crater?"

According to the team, it would be the 22nd largest impact crater known on Earth, if it really turns out to be one.

The team says it's possible that the two neighboring craters were simply formed by entirely separate impact events.

The second crater looks to be much older than Hiawatha, with features that are significantly more eroded, and it contains older ice than its neighbor.

NASA researchers have spotted possible signs of a huge, ancient impact crater buried a mile beneath the ice in Greenland.

The giant meteor crater five times the size of Paris was been found half a mile (0.8 km) under the ice in Greenland.

Which means we don't know if two objects hit Earth once or whether they smashed into us at different times.

Evidence of the epic pit was taken from eleven datasets compiled from a variety of resources, including radar and satellite imagery of Earth's poles and Greenland's ice sheets. By employing computer models that can track the production of large craters on Earth, they found that the abundance of said craters that should naturally form close to one another, without the need for a twin impact, was consistent with Earth's cratering record.

"This does not rule out the possibility that the two new Greenland craters were made in a single event, such as the impact of a well separated binary asteroid, but we can not make a case for it either", said Dr. William Bottke, a planetary scientist at the Southwest Research Institute.

"The existence of a third pair of unrelated craters is modestly surprising but we don't consider it unlikely", MacGregor said.

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