subduction
http://www.sott.net/article/262892-Massive-section-of-ocean-floor-off-the-coast-of-Portugal-beginning-to-fracture
A new subduction zone forming off the coast of Portugal heralds the beginning of a cycle that will see the Atlantic Ocean close, as continental Europe moves closer to America. Published in Geology, new research led by Monash University geologists has detected the first evidence that a passive margin in the Atlantic Ocean is becoming active. Subduction zones, such as the one beginning near Iberia, are areas where one of the tectonic plates that cover Earth’s surface dives beneath another plate into the mantle – the layer just below the crust. Lead author Dr João Duarte, from the School of Geosciences said the team mapped the ocean floor and found it was beginning to fracture, indicating tectonic activity around the apparently passive South West Iberia plate margin. “What we have detected is the very beginnings of an active margin – it’s like an embryonic subduction zone,” Dr Duarte said.

12 And I saw when he opened the sixth seal, and there was a great earthquake; and the sun became black as sackcloth of hair, and the whole moon became as blood;
13 and the stars of the heaven fell unto the earth, as a fig tree casteth her unripe figs when she is shaken of a great wind.
14 And the heaven was removed as a scroll when it is rolled up; and every mountain and island were moved out of their places. Rev. 6:12-14

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