A Quebec amateur astronomer was scouting a campsite using satellite imagery in 2024 when he spotted a 25-kilometre ring around Lake Marsal, and geologists who reached it by floatplane the following year found shatter cones confirming a roughly 390-milli – Space Daily

In 2024, Quebec amateur astronomer Joël Lapointe was planning a camping trip in Quebec’s Côte-Nord region and scrolling through satellite imagery when a nearly circular pattern of ridges caught his a…