There is a very helpful publication on ammonites in this area: https://pubs.usgs.gov/pp/1142/report.pdf
Page 11 mentions the Delintment Lake area being the Trowbridge Shale and dating from the Bathonian or Callovian ages of the Jurassic.
There is a very helpful publication on ammonites in this area: https://pubs.usgs.gov/pp/1142/report.pdf
Page 11 mentions the Delintment Lake area being the Trowbridge Shale and dating from the Bathonian or Callovian ages of the Jurassic.