Granby crater, Impact crater in Vadstena Municipality, Sweden.
Granby crater is an impact structure in Vadstena Municipality located in Östergötland in southeastern Sweden. The formation lies buried beneath the surface and spans about 3 kilometers in diameter, with its shape and extent determined through geological surveys.
This structure formed about 470 million years ago during the Middle Ordovician period when a meteor struck the region. The impact fundamentally reshaped the landscape of that time.
Scientists and geologists from various institutions study this impact structure to understand the patterns of meteor collisions during Earth's geological timeline.
The site is not visible from the surface since the structure lies completely buried beneath soil and rock layers. Those interested in learning about it can explore the area southeast of Vadstena and discover how researchers have studied this hidden formation.
Specialized drilling was required to discover and map the structure hidden deep underground. The process revealed characteristic features such as fractured and displaced rock that are typical of meteor impacts.
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