The precise, absolute age of the Corossol structure remains undetermined. It geological setting and cross-cutting relationships indicate that it was created long after the Middle Ordovician (470 million years ago) and before the accumulation of glacial till and creation of streamlined lineations, which are interpreted as subglacially produced mega-scale glacial lineations, on its surface. The relict cuestas and evidence of fluvial erosion observed on the outer walls of the structure, imply it was formed during one of the periods of regional lowstand of sea level prior to the Quaternary glaciations.[1][2][3]