Initially, during the Late Jurassic, continued rifting widened the Gulf of Mexico and progressed to the point that sea-floor spreading and formation of oceanic crust occurred.
22.
When the time scale of magnetic field reversals was confirmed in 1965-66, " most people were convinced that sea-floor spreading was for real,"
23.
Since the new oceanic basins are shallower than the old oceanic basins, the total capacity of the world's ocean basins decreases during times of active sea floor spreading.
24.
The Labrador Sea started opening 69 million years ago during the Maastrichtian period but sea-floor spreading appears to have ceased by the Oligocene period 30 35 million years ago.
25.
Rift episodes were followed by initiation of sea-floor spreading first to the south, then to the east, and finally to the northeast of the Grand Banks area.
26.
"And once people became convinced of sea-floor spreading, " he added, " that very rapidly led to the theory of plate tectonics ."
27.
In the early 1970s it began to be widely accepted that the ophiolite represented sea-floor spreading, and subsequently that the Troodos showed geochemical signatures like that of arc volcanics.
28.
This basin formed in response to the large scale plate tectonic forces that ripped apart the super-continent Pangea and also led to sea-floor spreading in the North Atlantic Ocean.
29.
Around 83.5 Ma sea floor spreading between India and Antarctica was asymmetric in the Kerguelen Plateau region with two-thirds of the sea floor created being added to the Antarctic Plate.
30.
Initial studies took place during the early 1970s by the Eltanin Cruises, which took bathymetric and magnetic tracks in order to interpret the general sea floor topography and sea-floor spreading rates.
