Suspicions on True Origin of World's Oldest 'Impact Crater' Have Now Been Confirmed 11 MARCH 2021 Earth and giant meteorites go way back, but new research confirms that what had been proposed as the oldest impact crater on the planet – the 100-kilometer (62-mile) wide Maniitsoq structure – isn't actually an impact crater at all.
Through a combination of field mapping, rock dating, and geological chemical analysis techniques, researchers have been able to show that features previously argued to be the faint signature of a long-eroded crater were anything but. The alleged structure is as much the product of the same geological processes as those that created the surrounding region.