Continental drift and plate tectonics

Continental drift

continental drift and plate tectonics

In the 20th century, researchers realized that the Earth's crust is not one piece, but is made up of many huge tectonic plates upon which the.

and   and   and   for    what are men compared to rocks and mountains

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Continental drift is the theory that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.
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Plate tectonic is newer form of Continental drift with more evidence and an proposed mechanism for the movement of the Continents. Continental drift was rejected at the time it was proposed despite substantial evidence to support the theory. The rejection was based on several factors. Continental drift challenged the prevailing theories of uniform processes, and the geosyncline theory of mountain building. The evidence for Continental drift indicated that the Continents had separated at timeline that went against the proposed evolutionary timeline for the fossil record. Most telling there was no proposed mechanism for what force could move the massive continents. Plate tectonics was developed after World War II.

What is the difference between the theory of continental drift and plate tectonics?


continental drift

Colliding Skyward The collision of the Indian subcontinent and Asian continent created the Himalayan mountain range, home to the world's highest mountain peaks, including 30 that exceed meters 24, feet. Because continental drift is still pushing India into Asia, the Himalayas are still growing. Also called lithospheric plate. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The Rights Holder for media is the person or group credited. Jeannie Evers, Emdash Editing.

Difference between Continental Drift and Plate Tectonics

There are several theories that explain how the present continents were formed. In this article, we take a closer look at two of the more popular theories — continental drift and plate tectonics — to learn how they differ from each other. In , Alfred Wegener, a German meteorologist, was the first to present a comprehensive theory concerning the continental drift. Wegener believed that the continents are composed of lighter rocks resting on heavier crust material just like an iceberg floating on the water. Wegener presented a good amount of evidence to back up his theory but failed to give plausible explanations as to how the continents might have drifted.

According to the theory of continental drift , the world was made up of a single continent through most of geologic time. That continent eventually separated and drifted apart, forming into the seven continents we have today. The first comprehensive theory of continental drift was suggested by the German meteorologist Alfred Wegener in The hypothesis asserts that the continents consist of lighter rocks that rest on heavier crustal material—similar to the manner in which icebergs float on water. Wegener contended that the relative positions of the continents are not rigidly fixed but are slowly moving—at a rate of about one yard per century. According to the generally accepted plate-tectonics theory , scientists believe that Earth's surface is broken into a number of shifting slabs or plates, which average about 50 miles in thickness. These plates move relative to one another above a hotter, deeper, more mobile zone at average rates as great as a few inches per year.


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