Editing Charlevoix impact structure (section)

== Description ==
The original impact structure is estimated to have been {{convert|54|km|mi}} in [[diameter]] and the age of the impact is estimated to be 450 ± 20 million years ([[Ordovician]] to [[Silurian]] age).<ref name="SchmiederOthers2019a">Schmieder, M., Shaulis, B.J., Lapen, T.J., Buchner, E. and Kring, D.A., 2019. ''In situ U–Pb analysis of shocked zircon from the Charlevoix impact structure, Québec, Canada.'' ''Meteoritics & Planetary Science.'' 54(8) pp. 1808-1827.</ref> The projectile was probably a stony asteroid, at least {{convert|2|km|mi}} in diameter, and weighing an estimated {{convert|15|billion tonne|e9ST|abbr=off|lk=on}}. The [[Les Éboulements, Quebec|Mont des Éboulements]], situated in the exact centre of the impact structure, is interpreted as the central uplift, a consequence of elastic rebound.<ref name="grandsjardins">Interpretation Centre, Parc national des Grands-Jardins, Charlevoix</ref> The impact structure is classified as a [[multi-ringed basin]] with a central uplift.

The impact origin of Charlevoix impact structure was first realized in 1965 after the discovery of many [[shatter cone]]s in the area. Other evidence for impact includes [[planar deformation features]] (PDFs) in [[quartz]] and [[feldspar]] grains.

In contrast to the surrounding craggy [[Laurentian Mountains]], the impact structure is relatively smooth and flat, which has facilitated human settlement. Today, 90% of the people of Charlevoix live within this impact structure.<ref name="grandsjardins"/>