Small Rimmed Depression in Lake Ontario: An Impact Crater?

Origin and provenance of spherules and magnetic grains at the Younger Dryas boundary

“…† Two other features, one (Charity Shoal) submerged in Lake Ontario (21) and the other (Bloody Creek) in Nova Scotia (22), may represent additional or alternate impact craters associated with the YDB event. They have not been accurately dated, but their proposed range of dates spans the YD onset.…”

12,800 years ago, Hellas and the World on Fire and Flood

“…A sea-level change definitely has been recorded in many sedimentary sequences at this time period all over the world and in particular in the Mediterranean, as mentioned before by Galanidou 2015 andPapoulia 2016. After 37 years of intensive debate, the scientific community accepted the dinosaur extinction at the Cretaceous-Tertiary boundary 65 million years ago as a result of a very large asteroid impact (Alvarez et al 1980 and1982), while the Younger Dryas onset impact was likely the result of multiple impacts of a much smaller sized asteroids, maybe in the order of up to kilometer size projectiles. Up to now, there are three enigmatic circular objects in the northeast of the United States and Canada, which are possibly impact craters formed by fragments of a large object that hit the Laurentide Ice Shield or exploded in the atmosphere: 1) The Charity Shoal, a circular one-kilometer in diameter and 19 m deep basin in Lake Ontario (Holcombe et al 2001); 2) The Bloody Creek Crater in southwestern Nova Scotia, a half-kilometer diameter and 10 m deep structure (Spooner et al 2009); 3) The four kilometer diameter between 40 and 185 m depth Corossol Crater in the Gulf of St. Lawrence, Canada (Higgins et al 2011). Except of the Charity Shoal structure, the Bloody Creek and the Corossol Crater were proven to have originated by meteoritic impact due to finding of high-pressure minerals and impact fabrics.…”