Signs of Early Precambrian Life?

'Stromatoforms' in the Lorrain Formation, Cobalt Group, Huronian Supergroup, Sault Ste. Marie, Ontario, Canada

Stromatoforms have been found on bedding plane surfaces of the upper white quartzite member of the Lorrain Formation on the north side of Gordon Lake, 50 km east of Sault Ste. Marie Ontario, Canada.(Location Map)