Talk:North Sea/Sandbox

Geological History
Late Devonian Scandinavia and Greenland located between the equator and subtropics (30-20 degrees north).

(The Devonian is a geologic period and system of the Paleozoic era spanning from to  .  The Paleozoic era consisted of Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian)

Late Permian Pangea encircled by subduction systems, which were complemented by major extension in the interiors of Pangea ... NOrth Sea areas.

(In geology, a subduction zone is an area on Earth where two tectonic plates meet and move towards one another, with one sliding underneath the other and moving down into the mantle, at rates typically measured in centimeters per year. An oceanic plate ordinarily slides underneath a continental plate or another oceanic plate; this often creates an orogenic zone or volcanic arc subject to many earthquakes. In a sense, subduction zones are the opposite of divergent boundaries, areas where material rises up from the mantle and plates are moving apart.)

{Permian is a geologic period and system that extends from 299.0 ± 0.8 Ma to 251.0 ± 0.4 Ma (million years before the present). It is the last period of the Paleozoic Era. the Paleo-Tethys Ocean, a large ocean that was between Asia and Gondwana. }

Late Permian there was some shifting the NOrth Sea remained in the subtropics, but the Barents shelf region north of the North sea, and Mid Norway were out of the sub tropics around 35 degrees north. At this time North Sea was an arid environment Marine basins started to develop east Greenland.

The North Sea remained almost entirely under a continental-paralic regime, with periods of marine incursion coming from the Tethys realm in the southeast. Rifting began northern part of Norway Greenland sea rift. Rfting that started rapidly during the Permo-Triassic had abated by middle Triassic. Areas began to subside and deep depcenters were developed.

During the middle Jurassic, mantle related up warping of a large dome occurred in the middle North Sea. This uplifting restricted faunal provinciality between the Arctic and Tethyan Sea. By middle Jurassic, the central North Sea rift dome subsided and open marine conditions were re-introduced. Communications between the Arctic and Tethyan Seas resumed via the North Sea and the FaeroeRockall Rift. The uplifted area in the North Sea area was centered on the triple junction of the Viking Graben, Central Graben and Moray Firth BAsin and included Scotland.Rifting in the North SEa was associated with an extrusive centre (Forties). The latter extrusives probably of syn-rift origis are also present in onshore areas in Scandinavia. Mid Jurassic continental clastics and sands were deposited in non-marine to parlic environments (major reservoirs in the North Sea)