Really Bad Day on Proterozoic Earth
is what we have here
you can put your finger on the line exactly _where_ and _when_ an ancient tidewater Stromatolite Mound was smothered by catastrophic Sudbury Impact Layer, 1.85 billion years ago
double zoom in or View Large to see a roiling carpet of shards, spherules and fine material that scoured matted cyanobacteria when Asteroidal Armageddon swept through the Thunder Bay area; this site is 675 km away from the Sudbury epicenter to the world's best exposed large asteroid impact crater (200 km wide and 6 km deep) when unfolded after being squished into a burrito shape by ancient plate tectonics.
The Sudbury impacter laid a stupefying "whupping" at least a continent wide upon ancient Earth.
en.wikipedia.org/wiki/Sudbury_Basin
more images of the Sudbury Impact Crater melt and farflung Sudbury Impact Layer are in my Rocks From Space album
Widespread evidence far away to the west of Sudbury shows that the asteroid impact terminated the deposition of an extensive basin of sedimentary iron formation. It also left a mid-continent rift zone, to be filled in by Rove Formation shales, bereft of microbiota for an extended period of time.
Water-sprayed 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 unique biogeochemical slice of 'deep time'.
Really Bad Day on Proterozoic Earth
is what we have here
you can put your finger on the line exactly _where_ and _when_ an ancient tidewater Stromatolite Mound was smothered by catastrophic Sudbury Impact Layer, 1.85 billion years ago
double zoom in or View Large to see a roiling carpet of shards, spherules and fine material that scoured matted cyanobacteria when Asteroidal Armageddon swept through the Thunder Bay area; this site is 675 km away from the Sudbury epicenter to the world's best exposed large asteroid impact crater (200 km wide and 6 km deep) when unfolded after being squished into a burrito shape by ancient plate tectonics.
The Sudbury impacter laid a stupefying "whupping" at least a continent wide upon ancient Earth.
en.wikipedia.org/wiki/Sudbury_Basin
more images of the Sudbury Impact Crater melt and farflung Sudbury Impact Layer are in my Rocks From Space album
Widespread evidence far away to the west of Sudbury shows that the asteroid impact terminated the deposition of an extensive basin of sedimentary iron formation. It also left a mid-continent rift zone, to be filled in by Rove Formation shales, bereft of microbiota for an extended period of time.
Water-sprayed 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 unique biogeochemical slice of 'deep time'.