You're quite welcome, & great comment Lilian, but I'm told that isn't really the case.
In considering your provocative post ;) , Rick Boulay has shared with me that the Choiceland/Kelsey Lake iron deposits are part of the Precambrian basement complex which gives a Proterozoic clock reset date (caused by a mountain building heat pulse) of about 1,700 million years, he thinks. This means that the C/K iron deposits are probably much older, perhaps as much as 2,500 million years, or even older. The FALC pipes are about 100 million years old, at the base of the upper Cretaceous.
The Bad Heart formation is 85 million years old, the same age as, say, the Mountain Lake and Ashton pipes. If Marum et al. are correct in their assessment that there are more pipes in the neighbourhood, the Bad Heart formation would be partially composed of fragments eroded off the pipes and would therefore be the same age or slightly younger than the pipes.
Best Regards,
-j
:>
PS,
- better coming from his informed response, than my guess! |
