DescriptionFranklin dike on northwestern Baffin Island..jpg
Large olivine gabbro intrusive between Pond Inlet and Arctic Bay in northwestern Baffin Island. Handheld from speeding helicopter.
The 723 million year-old Franklin Magmatic Event went clear across what is now Arctic Canada. Here is a link to flat-lying Coronation Sills of the same igneous rock in western Nunavut not far from its mantle plume source further west:
flic.kr/p/kPQvcn
Some of the swarm of large vertical dikes in northwestern Baffin Island continued down the length of one of the world's biggest islands before the non-surfacing crustal-cracking magmatic pulse ran out of gas (or continent) some 3000 km from where it all started.
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