The Gatun structure is a possible eroded impact crater. It is named after the nearby Gatun Lake in Panama. It was first discovered in 1972 by geologist Bob Stewart and later studied by Livio L. Tornabene from the University of South Florida Department of Geology.
The structure is estimated to have formed about 20 million years ago. This would place the event in the Miocene epoch. Despite the considerable erosion, it was possible to estimate the original diameter to have been 2.7 to 3 km, assuming the impact hypothesis is correct.
Although diagnostic evidence of impact has not been reported, evidence favoring an impact origin include the recovery of possible impact glass at the site. Alternatively, the site may be of volcanic origin.
Famous quotes containing the word structure:
“It is difficult even to choose the adjective
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—Wallace Stevens (1879–1955)