Eyewitness reports vary from smoke rising from the ground to celestial bodies impacting the earth shortly before the craters were found.
Crater found ocean floor.
A 250 million year old fault system supplying methane to enormous craters that line the floor of the arctic ocean has been discovered.
Unlike the other 4 or so tektite strewn fields each of which can be traced back to a large impact crater the australasian field s source has yet to be definitively located.
Most similar of all though are the unexplained craters being found all over siberia.
Scientists have discovered more than 4 500 mysterious holes off the coast of big sur california.
3000 2800 bce meteorite impact event possibly resulting from a comet.
Officials say it is not like this is the work of men but also doesn t look like natural formation sic.
The ancient impact was concealed under a field of cooled volcanic lava.
Today more than 600 gas flares have been identified in and around.
Geochemical analysis and local gravity readings told researchers that the crater lay in southern laos on the bolaven plateau.
A crater at least 28 miles wide and 1 7 miles deep formed by the impact of a comet or asteroid 50 million years ago has been discovered on the sea floor 125 miles southeast of nova scotia.
They are not.
1 present the best candidate yet for the long sought source crater of the australasian tektite strewn field.
The holocene impact working group hiwg propose that it was formed by a very large scale and relatively recent c.
Burckle crater is an undersea feature about 29 kilometres 18 mi in diameter in the southwestern indian ocean.
In the late 1990s scientists using ship mounted sonar found enormous craters more than 100 meters across and about 5 meters deep on the bottom of the pacific ocean.
The russian academy of sciences lists the feature as a potential impact crater.
Hundreds of craters with some over 3 000 feet wide were.
An unusual and unexpected discovery.
These craters known as micro depressions were discovered during a series of underwater surveys.
On the floor of lake neuchatel geologists have happened upon huge underwater craters some of the largest in the world to be found in lakes.