continental drift

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Fig. 118 Continental drift . The continent of Pangaea 200 million years ago.

continental drift

the theory originally put forward in 1912 by Alfred Wegener that continental masses were continuously moving over the surface of the globe as though floating on a sea of molten rock. Doubted extensively for many years, the theory is now generally accepted and supported by evidence from geomagnetic studies, the distribution of plants and animals, and the study of PLATE TECTONICS. Two hundred million years ago the present continents were joined in a universal land mass called Pangaea. Since that time, the continents have drifted apart and the study of plate tectonics shows that they are still moving. Over a period of 400 million years Britain has drifted from south of the tropic of Capricorn to its present position - over 80° of latitude. Pangaea was probably formed by previously separate continents coming together, and the Appalachian, Caledonian, Greenland and Scandinavian mountains probably resulted from North America and northern Europe coming into collision. Previous separation would account for the position of the equator and South Pole 440 million years ago.
References in periodicals archive ?
After collision contractions in the suture zone accommodate by transpression shear zone (Mohajjel and Rasouli, 2014).
As Ga'erqiong is about 300km away from the Yarlung-Zangbo Suture Zone, it's still lack of enough evidence so far to prove that the formation of intermediate-acid rock in Ga'erqiong is related to oceanic-ridge subduction of Neo-Tethys in early stage of Late Cretaceous.
Caption: Crackdown a crack in Antarctica's Larsen C ice shelf grew roughly 20 kilometers in 2014, ripping through a suture zone of soft marine ice that usually resists fracturing.
Terranes are thus defined by distinct paleontological, stratigraphic, structural, metamorphic, and igneous histories, but suture zones are commonly manifested solely as faults.
The melange marks the suture zone of the Boundary Mountain and Gander terranes (Boone and Boudette 1989) (Fig.
and Trommsdorff, V.: 1982, Magmatism and metamorphism in the Ladakh Himalayas, the Indus-Tsangpo Suture Zone. Earth and Planetary Science Letters, 60, 253-292.
Different kind correlation of these faults with structures can caused various type of deformation in Sistan suture zone.
The northern part of the area was separated from the southern part by a prominent E-W lineament expressed on Bouguer and isostatic residual gravity maps Such extensive gravity gradients mark regional crustalscale subsurface structures considered suture zones between two of the crust's block.
Kohistan Island Arc (KIA), a cretaceous arc has developed as a result of intra oceanic subduction of Tethys Ocean and separated from the Indian plate by Indus suture zone. Rock samples from Charbagh to Madyan area Swat were collected for petrography, geochemisty and geochronology to investigate the age relationships with the eastern extension in Pakistan.
The T-T zone is located in the Central portion of the Trans-European Suture Zone (TESZ).
The studied samples represent rocks of the Indus Suture Zone exposed in Bajaur agency, northwestern Pakistan.
In NW Pakistan, the ophiolites mark the suture zone between the Indian plate and Afghan plate.