Recently, a giant asteroid crater dating back more than 100 million years was discovered while mining for gold in Australia. But it’s still not the “biggest” meteor crater on Earth.
According to Forbes, while drilling the ground for gold, experts at Evolution Mining Company (Australia) noticed many strange points. Some rocks are abnormally deformed, in which many layers differ from each other.
The location discovered is in Ora Banda, the remote lands of Western Australia. When examined under a microscope, many layers of rock buried deep in the ground have the texture of broken glass. By analyzing the layers of gold in the mine, the experts also found that this precious mineral appeared to have been shattered by a powerful outside force.
Immediately, a group of scientists from many famous universities in Australia entered. Geophysicist Jayson Meyers (Australia) said the group had used many modern mapping methods such as electronic scanning or weight analysis to decode the mystery.
As a result, scientists have identified this as a giant crater. However, the hole is not “exposed” ie clearly visible on the ground like many other holes. The process of accretion of layers of soil in the middle of the desert temporarily masked this meteorite hole.
The group of calculations, the hole diameter of which can be up to 5 km, is in the group of craters with the largest size today. Dr Jayson Meyers also limited and determined the circumference of the hole.
Using carbon analysis, the team initially predicted that this crater formed over 100 million years ago, in the Cretaceous Period. It is also the flourishing period of the dinosaurs.
Currently, the team is further analyzing the physical properties within this area. The team examined the impact of this meteor hole on its environment.
The craters were formed by collisions between Earth and meteorites many years ago. The impact of a strong force pushed the ground back inward. For hundreds of millions of years, many pits have been restored by sediment and rocks.
Until now, scientists have known that about 180 meteor craters still retain the structure, most of which are “open” holes. Some meteorite craters are unbelievably large and old.
Also located in Western Australia, Yarrabubba is often considered the oldest meteorite crater on Earth. The pit has a diameter of nearly 70 km (white dotted circle) but only a small part is “exposed”. The team from Curtin University (Australia) analyzed the isotopes of the minerals zircon and monazite and determined that this hole formed about 2.2 billion years ago, which is about half the age of the earth.
A meteorite crater discovered in 2019 in China. The hole is approximately 1.9 km in diameter and 150 m deep. The Guangzhou Institute of Geology said the hole is located in the Xiaxing An mountain range (China). To date, only about a third of the crater has been damaged
Karakul Hole in Tajikistan. Located at an altitude of 3,900m above sea level, Karakul is often considered one of the tallest meteor craters in the world. The pit is estimated to be around 25 million years old. Today the pit is located in the Tajik National Park, recognized by UNESCO as a World Heritage Site in 2013
Located northeast of the Great Sandy Desert (Western Australia), the Wolfe Creek Trench is almost intact. According to scientists, Wolfe Creek is about 880m wide, about 55m deep. The hole is quite “young”, formed no more than 120,000 years ago when a meteorite fell to Earth at a speed of about 15 km / s.
Barringer is one of the world’s most famous meteor craters in America. Barringer is about 170 m deep, about 1.6 km in diameter, often considered the largest intact meteorite crater “open-air” today.
The Barringer pit is also quite “young”, around 50,000 years old. Previously, a meteorite nearly 50 m in diameter collided with Earth in the Arizona desert created this hole. The collision is estimated to be about 150 times more destructive than the atomic bomb dropped on Hiroshima