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The correct answer is - Seafloor spreading at the mid-ocean ridge provides the mechanism for tectonic plate movement.
Harry Hess is one of the people that is most important when it comes to the proving and world wide acceptance of the continental drift theory.
Hess was very interested in the topic, and he was constantly looking for clues that would bring light to it and finally have a definite proof of it. While sailing through the Atlantic and doing some examinations, Hess noticed that there high mountains in the water, having flat peaks, and being arranged in an interesting manner. These underwater mountains, named guyouts, were the highest at a certain point, and than on both sides, as the distance was increasing they were becoming smaller and smaller.
What Hess stumbled upon was the seafloor spreading and how it works, and he recognized that quickly. He immediately went on to share what he discovered, that there's magma coming from bellow, solidifying and spreading, thus creating new crust while pushing the old crust away from the center, which is the reason why the continents are moving.
Answer:
Una frontera es una línea convencional que marca el confín de un Estado. ... Por eso se habla de convención: los diferentes países acuerdan hasta donde llegan sus respectivos límites; al pasar dicho límite (la frontera), se ingresa en el territorio del país vecino. La frontera, por lo tanto, marca una soberanía.
Explanation:
Answer:
Caspian Sea
Explanation:
The largest lake in the world, or often referred to as a landlocked sea, the Caspian Sea, is the body of water on which both Russia and Iran come out and have borders on it. Iran occupies the southern part of the Caspian Sea, while Russia occupies the northern half of its western part and the northwestern part. The other three countries that have their share in this lake are Kazakhstan, Turkmenistan, and Azerbaijan.
The Caspian Sea is actually a lake, as in order to be classified as a sea it has to be connected with the rest of the ocean and sea waters, and it is not, it is landlocked. It has saline water though, which is why it is referred to as a sea. The saline water in it is there because this lake is a remnant of a once very large ocean, Tethys, that was stretching all the way from Spain to Indonesia, and from the central part of the Indian Ocean to Central Asia. With the movement of the Indian plate toward southern Eurasia, and the African toward western Eurasia, this ocean was closed down. The collision of these plates with he Eurasian caused the formation of numerous mountain chains as well, so Tethys was totally destroyed, only leaving behind it remnants like the Caspian Sea deep inland.