a bad day in any hemisphere
you can put your finger on the line exactly where and precisely when ancient tidewater stromatolite mound was "cadaverized" by catastrophic Sudbury Impact Layer, 1.85 billion years ago
zoom in or View Large to see a roiling carpet of shards, spherules and fine material that fell on top of matted cyanobacteria when Armageddon swept through the Thunder Bay area; this site is 675 km away from the Sudbury epicenter to the world's second largest known asteroid impact crater
latest of several images depicting the Sudbury Impact Crater melt and farflung Sudbury Impact Layer in my Rocks From Space album
The Sudbury impacter laid a stupefying "whupping" at least a continent wide upon ancient Earth.
Widespread evidence out here far to the west of Sudbury shows that the asteroid impact terminated the deposition of an extensive basin of sedimentary iron formation and left a mid-continent rift zone bereft of microscopic lifeforms for an extended period of time.
Wetted-down 2 ft (0.6 m) Thunder Bay area rock sample in the back yard of Rox Rock Shop in Westport ON, destined for slabbing and polishing. Store is geotagged, should anyone want to acquire a dramatic biogeochemical slice of ancient history.