Ancient crater points to massive meteorite strike

This is a map showing the construction as well as contour of the Bow City crater. Color variation shows meters higher upward bounding main level.

The start hints nigh the touching on site close the southern Alberta short town of Bow City were discovered past times a geologist amongst the Alberta Geological Survey as well as studied past times a U of H5N1 squad led past times Doug Schmitt, Canada Research Chair inwards Rock Physics.
Time as well as glaciers accept buried as well as eroded much of the evidence, making it impossible at this indicate to nation amongst amount certainty the ring-like construction was caused past times a meteorite impact, only that’s what seismic as well as geological prove strongly suggests, said Schmitt, a professor inwards the Faculty of Science as well as co-author of a novel newspaper nigh the discovery.
“We know that the touching on occurred inside the concluding seventy meg years, as well as inwards that fourth dimension nigh 1.5 km of sediment has been eroded. That makes it truly difficult to pivot downwards as well as truly engagement the impact.”
Erosion has worn away all only the “roots” of the crater, leaving a semicircular depression viii kilometres across amongst a fundamental peak. Schmitt says that when it formed, the crater probable reached a depth of 1.6 to 2.4 km — the sort of touching on his graduate educatee Wei Xie calculated would accept had devastating consequences for life inwards the area.
“An touching on of this magnitude would kill everything for quite a distance,” he said. “If it happened today, Calgary (200 km to the northwest) would last completely fried as well as inwards Edmonton (500 km northwest), every window would accept been blown out. Something of that size, throwing that much debris inwards the air, potentially would accept global consequences; at that spot could accept been ramifications for decades.”
The touching on site was start discovered inwards 2009 past times geologist Paul Glombick, who at the fourth dimension was working on a geological map of the surface area for the Alberta Geological Survey. Glombick relied on existing geophysical log information from the stone oil as well as gas manufacture when he discovered a bowl-shaped structure.
The Alberta Geological Survey contacted the U of H5N1 as well as Schmitt to explore further, peeking into public past times analyzing seismic information donated past times industry. Schmitt’s student, Todd Brown, afterwards confirmed a crater-like structure.

The higher upward story is based on materials provided by University of AlbertaNote: Materials may last edited for content as well as length.