"I have found an possible impact crater in Amazon basin, Brazil.
The 12.5 Km diameter circular structure lies on the Paleogene-Miocene sediments (Alter do Chao formation).
Possible age is Paleogene or younger. Further investigations in this structure in progress" (Krisztian Klajnik, 2020).
Круглая структура в палеоген-миоценовых отложениях (Формация Альтер-ду-Чао). Geological map: Rio Uatuma 1:250 000, CPRM (2014)
