The Faroe Islands Platform – and why Greenland drifted first to to the east and then to the west

The Faroe Islands are formed in a similar way as Iceland. Those interested in the geology of the islands can first read https://en.wikipedia.org/wiki/Geology_of_the_Faroe_Islands.

Then look at the map of the Faroe Platform. You can notice the round form north of the islands.

The Faroe Platform as seen on Google Earth

East of the islands, the Faroe-Shetland Trough seperates the two island clusters. West of the Faroe islands, the Faroe Gap plays a similar role.

This can be considered in relation to the convection rolls system. The Faroe-Shetland Trough clearly follows the convection rolls alignment. Let us combine the calculated alignment and the circular formation north of the islands, assuming a north-south symmetry of the said form.

The Faroe Islands Platform in calculated form

The calculated alignment of convection rolls at 62°N has the deviation 53° from west axis. The arc found north of the islands has symmetrical end points, coinciding with similar trends of the sides to the east and west (both have deviation of 53° from east-west axis). The resulting fan image is the basic form of the Faroe Islands Platform.

And if compared to the convection rolls system, you might become surprised!

The position of the Faroe Islands Platform within the convection rolls system

This shows that the more you look into each aspect, the more you know, the more you understand, the more clear the resemblance between surface topography and interior magma flow.

But how did the Faroe Islands get to the present location. The basalt formation are up to 58 million years old. This can be traced backwards, thanks to GPS measurements of tectonic drift. https://www.iris.edu/hq/files/programs/education_and_outreach/aotm/14/1.GPS_Background.pdf

If we simply prolong the drift vector over 58 million years, the distance is more than 1,000 kilometers. Take the two factors into account, expansion of sea floor, and the rotation of it:

The preconditions of tectonic drift of Faroe Islands for 58 Ma

This happened when Greenland was splitting apart from Canada. Therefore the old fissures are in the Faroe Islands are oriented NW to SE. Later, the orientation of the Reykjanes Ridge became dominating, so the volcanic fissures became aligned NE to SW http://iugs.org/33igc/fileshare/filArkivRoot/coco/FieldGuides/No%206%20Faroe%20Islands%20Basalt%20Group.pdf

And if this is not enough to explain, let us look into the past:

Volcanic Activity in Greenland 70 Ma.

Greenland and Baffinland started to be divided, leaving marks of volcanism in W-Greenland. The effect became two-fold, as the line to SE split Greenland from Baffinland, but also the polar line leading over Greenland to SE became active. Volcanism can therefore be traced over Greenland https://www.google.com/search?client=firefox-b-d&channel=crow&biw=1920&bih=938&tbm=isch&sa=1&ei=dMwjXezIHsTSkgXzoZqwBQ&q=travelling+of+hot+spot+over+greenland+map&oq=travelling+of+hot+spot+over+greenland+map&gs_l=img.3…3714.4204..4556…0.0..0.98.361.4……0….1..gws-wiz-img.mJyecj4yRqg#imgrc=cd2ypyiYZPaOFM:

Later, when the Reykjanes Ridge took over, the line from Iceland to Greenland caused volcanism in E-Greenland. Therefore, the path over Greenland is actually caused by two different convection rolls division lines.

This could of course also be drawn with 10 pictures in a timeline 🙂

The position 58 Ma

This is a bit different from convectional drawings. The lines fit to all the igneous rock formations. The line forming the Labrador Sea extends between Ireland and Scotland, causing eruptions there. The combined effects of expansion of the North Atlantic, Charlie-Gibbs Fracture Zone and the N-E rotational trend of Europe explain the movement to present location during the next 58 Ma. Greenland on the other hand drifts back and forth during that time, first to N-E and then to N-W.

Puple color shows 55 Ma basalt

This map is from https://www.mn.uio.no/ceed/english/about/blog/2017/volcanic-ash-layers-svalbard.html

The volcanic pattern of around 55 Ma

This is by no means an exact drawing, but what is pointed out here is the combination of the main system responsible for the opening of the Labrador Sea, the shift to the formation of the Reykjanes Ridge, and the igneous rock in Ireland and Scotland.

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