The Northern North Sea basin is a large sedimentary basin lying between Norway and Denmark to the east and Scotland and England to the west, formed by extensional tectonics that stretched and rotated fault blocks across a rift roughly 150 to 200 kilometers wide. Its rock strata span from before the Triassic period through the Tertiary, accumulated first during active rifting and then through thermal subsidence as the stretched crust cooled over roughly 100 million years. The basin is one of the world's most productive hydrocarbon provinces, holding more than 100 billion barrels of recoverable oil and natural gas.
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