Discovery of a Meteorite Impact Site Beneath Oklahoma
Scientists have identified a 16-kilometer-wide meteorite crater hidden beneath Oklahoma, USA, originally thought to date back to the Ordovician period around 467 million years ago. However, recent radiometric dating techniques have revised its age to approximately 370 million years, aligning the impact with the Late Devonian mass extinction event. The crater was uncovered in 1991 during seismic surveys conducted by oil exploration teams and lies buried beneath 3 kilometers of sedimentary rock.
Earlier assumptions placed the crater’s formation in the Ordovician, but advanced analysis of microscopic zircon crystals has clarified its true age. Researchers from NASA’s Johnson Space Center utilized uranium-lead decay methods on these zircon crystals to pinpoint the timing of the meteorite strike. This revised age suggests the impact might have contributed to environmental upheavals during the Late Devonian extinction, alongside known factors like supervolcanic eruptions and drops in oceanic oxygen levels.
Environmental and Economic Impact of the Meteorite Impact
Remarkably, the meteorite collision created an underground reservoir that trapped hydrocarbons, which have since yielded over 17 million barrels of oil and more than 2 billion cubic meters of natural gas. Over millions of years, the crater became covered by layers of limestone and sandstone, effectively sealing it beneath the surface.
“This discovery effectively removes a key event from the Ordovician timeline and places it within the Frasnian-Famennian extinction interval, where this impact truly belongs,”
Elizabeth Catlos
These findings highlight the critical role meteorite impacts play in Earth's evolutionary history and their potential influence on mass extinctions. With this updated dating, scientists are now able to reassess the connection between extraterrestrial impacts and global extinction events. Future research inspired by this breakthrough may shed light on how such cosmic collisions have shaped life on our planet and encourage renewed examination of other impact sites and their environmental effects.
“Conducting similar isotope analyses on other known continental craters is essential to constructing an accurate record of ancient catastrophic events,”
Danny Stockli
In light of recent findings on the Oklahoma meteorite crater, it's worth exploring other significant impact sites, such as the one recently discovered in Quebec. This site, recognized as the largest meteorite impact crater identified in five years, underscores the ongoing revelations about the Earth's geological history. For more insights into this remarkable discovery, visit the largest meteorite impact crater found in five years.