Posted on 01/05/2020 1:47:12 AM PST by SunkenCiv
...Earth was bombarded on a regular basis during its formative years -- by meteorites and other space rocks. Some of those collisions left behind evidence that is still observable today in the form of craters. One of them is Mistastin Lake crater located in Labrador Canada, which is approximately 28 kilometers across, suggesting that the object that struck the Earth there was large. The researchers dated the collision that caused the crater back to approximately 38 million years ago... In studying the crater, the researchers found evidence of zircon, a common mineral, being changed into cubic zirconia. Prior work with both minerals has shown that temperatures of 2370° C are required for that to take place. Thus, the heat generated by the impact had to have reached at least that temperature. The finding represents the hottest temperature ever found to exist naturally on the surface of the Earth. The researchers note that this is the first time zirconia has ever been used to calculate the heat of an impact and also shows that some rocks can get hotter naturally than has been thought.
(Excerpt) Read more at phys.org ...
Yikes
Sez here third-largest, but yeah, it's big, and it's really old.
I miss Frank.
L
Not important to most, because they understood that only natural events were being discussed.
That explains those infomercials...
Approximately 790,000 years ago:
The late Eocene started right at that point. Weird coincidence. The Ries Basin impact may have brought on the Middle Miocene.
Not according to the headline, which is what attracted my attention.
Not important to most, because they understood that only natural events were being discussed.
Not according to the headline, which is what attracted my attention.
So, the headline said that they understood that only natural events were being discussed.
So, how do you like to be nitpicked? Hit the bricks.
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