Sea Floor Spreading Labrador Sea

The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century.

Sea floor spreading labrador sea.

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. Approximately 170 km 110 mi of paleocene separation occurred between greenland and baffin island producing oceanic crust within baffin bay. Sea floor spreading in the labrador sea. It is concluded that seafloor spreading started in the labrador sea in the palaeocene chron 27n and that large areas under deep water formerly thought to be underlain by oceanic crust should now.

Basalt the once molten rock that makes up most new oceanic crust is a fairly magnetic substance and scientists began using magnetometers to measure the magnetism of the ocean floor in the 1950s what they discovered was that the magnetism of the ocean floor around. A new reconstruction w. 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 somewhat different from previously published reconstructions. The labrador and greenland margins later separated and the central labrador basin developed by sea floor spreading.

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. 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. It is suggested that the labrador sea structures terminate in baffin island and that davis strait is largely underlain by foundered continental crust. A sedimentary basin which is now buried under the continental shelves formed during the cretaceous.

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