Sea Floor Spreading Labrador Sea

Onset of magmatic sea floor spreading was accompanied by volcanic eruptions of picrites and basalts in the paleocene.

Sea floor spreading labrador sea.

Sea floor spreading in the labrador sea. It is suggested that the labrador sea structures terminate in baffin island and that davis strait is largely underlain by foundered continental crust. Sea floor spreading magnetic lineations 25 59 ma and older have been reidentified in the labrador sea by using previous magnetic compilations and some recently acquired data. A new reconstruction w.

The higher density of these identifications enabled the calculation of a new set of better constrained rotation poles that describes the sea floor spreading history of the labrador sea and baffin bay in a way that is. Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them. The labrador and greenland margins later separated and the central labrador basin developed by sea floor spreading. There are also regions of the iberia ocean continent transition particularly to the east of the peridotite ridge where block faulting is not obvious because the basement is relatively.

The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. The labrador sea analog draws that argument into question by showing that rotated fault blocks are also a characteristic of very slow spreading oceanic crust. Seafloor spreading reached the northern labrador sea 60 40 million years ago and greenland moved simultaneously past ellesmere island along the nares strait. The labrador sea formed upon separation of the north american plate and greenland plate that started about 60 million years ago and stopped about 40 million years ago.

This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. Approximately 170 km 110 mi of paleocene separation occurred between greenland and baffin island producing oceanic crust within baffin bay. A sedimentary basin which is now buried under the continental shelves formed during the cretaceous.