Answer:
A sediment deposit close to the continental rise having a coarse material overlaid by successively finer materials of non marine origin is called a turbidite.
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Explanation:
Turbidity current is the movement of sediment laden water . It is caused by the high density nature of sediments . The current is prevalent in oceans and lakes and it one process that transport sediments from coastal areas to deep sea.
The sediments in the current makes the flow denser and very rapid. The rapid nature of the movement of this sediment laden water causes a kind of selective deposition in deep sea. The more coarse sediments are deposited before less coarse sediments. The sediments deposited fines upward. The coarsest sediments are found at the bottom and it fine upward.
Turbidites are sediments deposited by turbidity currents which gradually change from coarse grain to fine grain sediments. The continental rise is the boundary between continents and the deep part of the oceans. This area is usually laden with sediment deposited by turbidity current. The sediments laden water moves downhill.
One of the evidences that Wegener used for his theory of continental drift was that the mountains in North America appear to be part of the same chain of mountains as those in Northern Europe.
Explanation:
Alfred Wegener is considered to be the first person that managed to gather enough evidence and push through the theory of continental drift. This was not an easy task though, as the technology was still not at as developed as it is now, and also there was big skepticism among the other scientists about his suggestions. Wegener was not discouraged, but instead he totally focused his career on the continental drift theory, and eventually it paid off.
One of the evidence that Wegener was using was that the mountains in the eastern part of North America appear to part of the same chain of mountains as those in Northern Europe. Wegener was right, as the Appalachian Mountain Range and the mountains in Scandinavia are actually formed as part of the same orogeny, and they were indeed connected. Over time Europe and North America drifted apart, but the evidence are there to be seen
Other evidence that Wegener used for his theory are:
- the matching coastlines of South America and Africa
- fossil evidence
- geological evidence
- mid-Atlantic Ocean ridge
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Answer:
Physioeconomically, the Russian Federation may be conveniently divided into 9 major regions: the Central European Region, the North and Northwest European Region, the Volga Region, the North Caucasus, the Ural Region, Western Siberia, Eastern Siberia, Northern and Northwestern Siberia, and the Russian Far East.
Explanation:
