The two north volcanic zones of Iceland

Geologists focus on one volcanic zone of North Iceland, the one extending from Askja to Öxarfjörður. The Skagafjörður volcanic zone is still active, as earthquakes occasionally show, and Hofsjökull might be a part of it still active. Again, we can compare model and real circumstances:

Skagafjörður and Öxarfjörður are 3° apart, having same arrangement of convection rolls

The accurate consistency between model and surface features is one more reason that the convection rolls of the model are correctly calculated.

To learn about Skagafjörður volcanic zone, please read https://www.google.com/search?ei=XydrXKKQJcnawALJx6rwDA&q=%C3%A1rni+hjartarson+skagafj%C3%B6r%C3%B0ur&oq=%C3%A1rni+hjartarson+skagafj%C3%B6r%C3%B0ur&gs_l=psy-ab.3…4355.9971..11309…0.0..1.210.2360.16j6j1……0….1..gws-wiz…….33i21j33i160j0i22i30.HD99sOGAOXQ


The four extra volcanic zones of Iceland

Besides the parallel volcanic zones, WVZ and EVZ, and the NVZ, there are four volcanic zones outside rift zones, one of the extinct.

The volcanic zones – the function of Skagafjörður and Snæfellsnes

This map shows the drift direction, due to effect of layer 2, leading to rifting in Skagafjörður for a period of about 1 million years. Note the volcanic sites on the NS and EW axis. The two volcanic zones of Skagafjörður and Snæfellsnes became active around the same period of time, as the same drift mechanism to the SW caused enough tension in the areas for volcanic zones to develop. The drift vector is of course totally different than people are used to see, as the convection rolls system has hitherto not been known. Once taking the different factors into account, it becomes possible to understand the details of the tectonic drift history of Iceland and elsewhere.


The settings of the Skagafjörður Volcanic Zone

According to Árni Hjartarson https://orkustofnun.is/gogn/Greinar-starfsmanna/Arni-Hjartarson-2003-PhD/AH-04-Skagafjordur-Zone-an-ephemeral-Rift-Zone.pdf the Skagafjörður Volcanic Zone appeared 1.7 million years ago. It can be analysed according to the convection rolls:

Skagafjörður Volcanic Zone map by Árni Hjartarson inserted to a map base of Nátúrufræðistofnun. Convection Rolls Pattern for reference.

The Northern Reykjanes Ridge Rolls (with upwelling division line) excerts force to the east within the volcanic zone, pulling against the main tectonic drift to the west, thereby causing rifting within the area. The line below adds to the trend, marking the western front of the volcanic zone with a SE-NW alignment. During a million years the zone was active. Today the rift zone east of the main mantle division line (the wide black line) is responsibile for all the drift within that latitude.

The northern end is marked by the Skagafjörður polygon, wehreas the southern end is defined by the Hofsjökull polygon.


Comparing volcanic sites

Comparing different maps with the grid of convection rolls found in layers under Iceland is necessary. Here is one example, comparing with a simple map from the Iceland Magasine https://icelandmag.is/article/icelands-northernmost-settlement-and-tallest-peak-tremble-quakes-oraefajokull-and-grimsey

The grid and the volcanic systems

By showing the polygons mostly includen, the two volcanic zones of the south, can be marked clearly, and the north volcanic zone becomes tracable as well. The two zones of Snæfellsnes and Öræfajökull clearly span over relevant polygons.

The polygons of volcanic zones marked specially

The Ocean Ridges and Mantle Rolls Alignment

The Ocean Ridges around Iceland follow the calculated alignment of convection rolls, as shown here:

The ridges compared with convection rolls.

The resemblance is also found for the volcanic zones of Iceland as marked. The two axis the Icelandic ocean floor plateu parabola are marked to show the resemblance with the end of the old, formerly active, Ægir Ridge. Green circle shows the parabola of the ocean floor platform of Iceland, which is almost identifiable with a single look on a Google map. Analysis of that platform shows the two axis, one NS-axis through Hekla, the other EW-axis through Snæfellsjökull and Snæfell. A vertical view from Google maps can be viewed for comparison:

The three ocean ridges around Iceland


A little test for similarities between the NW and East of Iceland

In some posts here, it is postulated that similarities can be found between the Strandir area in NW Iceland and the East Fjords. Marking the extinguished volcanic sites of the NW with circles and comparing with the East, it actually fits. Extinguished volcanic sites are found at the same locations, at first sight beyond sheer coincidence.

The old volcanic sites of the NW compared with the East Fjords.
Drawn on map base from Náttúrufræðistofnun (The Icelandic Institute of Natural History).

The parallel origin of these areas seems to lead to a similar distribution of volcanic sites. This is by no means a thorough comparison, as this is just to point out an idea for those interested in geoscience to compare those areas.


The interior

Humanity is missing something, not knowing about the mantle currents within the Earth. Here is a drawing for explanation:

The globe and the mantle current pattern within it

This is a beginning, as the layers of inner core, outer core and mantle are shown. The same laws of physics are used for the analysis for all the layers. Measurements and physics fit together! In other words: The measured thickness of each of Earth’s layers does match with an arrangement of convection rolls. These rolls are expected to form according to the laws of physics, namely convection within a rotating globe.