Nestled in Guangdong Province near Zhaoqing City, the Jinlin crater was recently identified as an impact site. Only about 200 confirmed impact craters exist around the world, making each new find significant. What makes Jinlin particularly interesting is its size and youthful age.
Dating back to the Holocene epoch, which began around 11,700 years ago, researchers estimate that this crater formed early in this period. With a diameter of up to 900 meters and a depth of 90 meters, it is much larger than Russia’s 300-meter Macha crater, previously the largest known from the same era.
Surprisingly, the Jinlin crater has remained intact despite the region’s wet climate, which typically erodes such features. It is preserved within thick weathered granite layers, shielding it from the elements.
The proof of its extraterrestrial origin lies in the granite itself. Scientists have found quartz fragments with specific characteristics that indicate they formed under intense shockwaves caused by a meteorite impact.
Dr. Ming Chen, the study’s lead author from the Centre for High Pressure Science and Technology Advanced Research in Shanghai, explained, “On Earth, the formation of these features is possible only through impacts from celestial objects.” This occurs under extreme pressure, much higher than what Earth’s geological processes can produce.
While researchers have identified the object as a meteorite, they still need to determine its exact makeup. This discovery also challenges ideas about how often large impacts occur on Earth.
Statistically, the chances of impactful events are equal across the planet. However, the rate at which evidence erodes varies due to geological differences. Craters like Jinlin can survive in areas where others have vanished, suggesting there are likely more undiscovered impact structures waiting to be explored.
As experts continue to study the Jinlin crater, it may provide new insights into how often big space rocks collide with our planet and the processes that either preserve or destroy these ancient records of cosmic history.
Exploring such craters can also deepen our understanding of Earth’s dynamic history and the relationship between our planet and outer space. Discoveries like Jinlin remind us of the events that have shaped our world and may continue to do so in the future.
This article was originally published by Universe Today. Read the original article.
