100 Kilometres across, in northern Quebec, it's ne of the oldest impact craters known. Formed during a surely tremendous impact about 200 million years ago. Must have been spectalular.
Ramon Crater is the largest one one of the three Negev craters. It contains geological formations unparalleled elsewhere in the world. Together with magnificent panorama, it presents a fascinating story of geomorphologic evolution. The Ramon Nature Reserve encompassing the crater and the Negev mountains surrounding it is the largest nature reserve in Israel.
Forty kilometers north of Pretoria lies a ring of hills a kilometer in diameter and 100 meters high. These hills are the walls of an impact crater left by an asteroid which hit there some 200 000 years ago. The Tswaing crater is similar in size to the well-known Barringer meteor crater in Arizona. The crater walls at Tswaing were originally about twice as high as they are today.
The most readily-recognizable surface features linked to the Chicxulub Crater on the Yucatan Peninsula (associated with the comet/asteroid impact 65 million years ago that probably contributed to the extinction of the Dinosaurs) is this ring of cenotes (natural circular wells in the limestone). The placemarks are only guides - there are many hundreds of cenotes apparent in the satellite imagery.
Sedan was a cratering experiment as part of the Plowshare program - the peaceful uses of nuclear explosives. The 104-kiloton nuclear device explosion displaced about 12 million tons of earth, creating a crater 1,280 feet in diameter and 320 feet deep.
Subscribe in a reader
Subscribe by e-mail
Get updates via Twitter
Connect on Facebook
