The chicken or the egg? Or shall I re-phrase that and ask if it was the MMS or the banded iron formation?
I'm no geo, but I know there are some of you folks out there so bear with me if I'm wrong, but I really do think this changes everything.
Last week, in the newspaper, there were a bunch of scientists in Quebec, on the other side of Hudson's Bay, that thought they might have found some of the oldest rock on earth. I'll see if I can dig that up for reference. Why would this matter, you might ask?
Because remember when RN said "This could be the grand-daddy of them all". ???
Big, fat, clue there. What does grand-daddy imply? Not size, necessarily, but age, and where you can trace your lineage to.
From what I gather, the earlier a deposit dates in earth's history, VERY generally speaking, the richer the deposit. Unfortunately, eons of erosion and metamorphosis tend to hide the clues rather well, which makes it more difficult to ferret out earth's secrets.
At any rate, I'm providing a link to an interesting site which talks about the topic I'm broaching here. Let us refresh our memories from NR's past, and remember key words like "doming of greenstone rocks" "pluton" etc. And wayyyy back there was the word "komatiite", in SPQ's NR I believe, or possibly FWR's.
What I am curious to know, and I don't know that we will ever get to know except years down the road, is was the BIF laid down later, as this article suggests may have happened? And then the plutonic intrusion, which would have cause a partial re-melt of the BIF? Or maybe we had several episodes of magmatic events, as has been proposed.
http://paleogeology.blogspot.com/200...
At any rate, this could be the great-great-grand-daddy of them all.
Looking forward to some feedback from our geo types,( and go easy on me, Bentonstocks..but I do welcome your opinion!!!) and hoping we can get our eyes on the prize again.
GLTAL