While the essence of your message may be accurate, I'm detecting some "smoke" in some of the details.
You would be referring to the North Atlantic Igneous Province, which according to cosmogenic exposure events, isotope records from deep oceans and Greenland ice cores, and Ar-Ar radiometric dating, is 60 million years old.
You don't supply any references, so I don't know where this information is coming from or how they are relevant to that 60 mya date. I'm suspecting that you're throwing in some gratuitous "big words". Ar-Ar dating probably is relevant, but I don't remotely see the relevance of Greenland ice cores.
In regards to the nice photo:
First, I wish to emphasize that the mountains appear to be the erosional remnants of much wider spread flood basalts, and are not volcanoes in themselves. You probably knew this, but others may not realize such.
Note that gneiss is metamorphic rock, so it has undergone intense heat and pressure within the earth after the original lava flows occurred.
Your italics. This statement seems to say that the protolith (original form) of the gneiss were volcanics ("lavas"). That seems to have considerable inaccuracy. If you were referring to the volcanics of the mountains, then the age relationship is flat out wrong - The metamorphism of the gneiss totally predates the the volcanics of the mountains.
quote:
The Lewisian gneisses represent the oldest rocks in Britain and date back to around 3000 mllion years ago. These rocks which were mostly granite-like in origin, have experienced numerous upheavals in the Earth's crust or 'mountain building events', that have deformed and metamorphosed the rocks.
Source
There are sandstones and shales at the base of the mountain which contain conglomerates. These conglomerates contain weathered bits of Lewisian gniess, as well as material from rocks that have long ago eroded or been buried.
This supports the sequence:
1) Metamorphism of the gneiss, then,
2) Unburial of the gneiss and the sediment deposition, then,
3) The volcanics.
I may well be nit-picking, but I don't like seeing "that's not quite accurate" geology coming from the science side of the debate.
Moose
Professor, geology, Whatsamatta U
Evolution - Changes in the environment, caused by the interactions of the components of the environment.
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