Analysis of information sources in references of the Wikipedia article "Bow City, Alberta (former village)" in English language version.
The crater has long been covered over and is estimated to be about 70 million years old. It took an analysis of data from boreholes drilled in the area and seismic wave surveys to show the giant crater below the surface. Xie and her colleagues will continue to search for definite proof, and they are looking for evidence of impact known as "shocked minerals."
"I was really surprised," said Wei Xie, a graduate student in geophysics at the University of Alberta, who presented the find on Dec. 3 at the American Geophysical Union conference. So far, Xie says, only a handful of these buried craters are known. That's likely to change. "Our technology is really improving," she said.
The seismic map of the crater shows the structure of it quite well, with its low-lying interior and characteristic central peak. The team also noted some potentially unique features of the crater, which indicate that some of the sediments were pushed directly outward from the impact, rather than being blown upwards (as would be expected).
"I was really surprised," said Wei Xie, a graduate student in geophysics at the University of Alberta, who presented the find on Dec. 3 at the American Geophysical Union conference. So far, Xie says, only a handful of these buried craters are known. That's likely to change. "Our technology is really improving," she said.
The seismic map of the crater shows the structure of it quite well, with its low-lying interior and characteristic central peak. The team also noted some potentially unique features of the crater, which indicate that some of the sediments were pushed directly outward from the impact, rather than being blown upwards (as would be expected).
