Seafloor spreading

Scientists were able to uncover the answer to this question through sea-floor spreading, or more accurately, evidence from molten material, magnetic stripes, and drilling samples. It all starts at the mid-ocean ridge, the longest chain of underwater mountains in the world. During the process of sea-floor spreading, molten material rises from the mantle and erupts at the mid-ocean ridge. The hot material spreads out, pushing away the cool, older

Pangaea Existence Proven Have you ever heard of Pangaea? Do you think it is real? Do you need someone to prove it for you? Well,I am here to prove Pangaea’s existence to you. To begin with, you need to know what Pangaea is. Pangaea was thought of in the year of 1912. This theory was called Continental Drift and was proposed by Alfred Wegener.Pangaea was thought to be a Super Continent. When Alfred Wegener proposed this theory no one really believed him because he did not have much

Based on the information in the textbook and the instructor note, plate tectonics is the Earth’s surface divided into several plates that move slowly and change in size. I found the video Plate Tectonics: “Birth of a Theory” in session 13 very useful. It helps me understand the material easily by using the animation to illustrate the process of plate tectonics. It is amazing about the fact that the continents can be made to fit together like pieces of a picture puzzle. About 225 million years ago

Alfred Wegener gave many facts that help prove his Continental Drift theory. Wegener’s supporting facts include fossil evidence, land features, climate evidence, and sea floor spreading. In the beginning of Wegener’s research to prove his Continental Drift theory, he found clues from fossil evidence from millions of years ago. Different animals, such as the Cynognathus, Lystrasaurus, and Mesosaurus gave proof that the continents have moved. The Cynognathus was a land animal, whose fossils where

Alfred Wegener was a German Polar Researcher, geophysicist, and a meteorologist. He was born in November of 1880, and later died in November of 1930. His theory for the continental drift was that the continents had once been joined, called Pangea, and later drifted apart to form seven continents. Alfred Wegener had to gather a lot of information to prove his theory correct. The first supporting evidence Alfred found was how the continents were once connected. He was not the only one to see this

The Olympic National Park is one of the most diverse national parks in the United States. The Olympic National Park has three main regions including the Pacific coastline, alpine areas, and the forest. The three basic ecosystems are the sub-alpine forest and wildflower meadow, temperate forest, and the rugged Pacific Shore. The park covers nearly 923,000 acres of wild land, including 60 known glaciers, 73 miles of coast, and 3,000 miles of rivers and streams. The Olympic National Park is located

The western Cordilleran orogenic belt had been depicted as a passive margin after Neoproterozoic to Early Cambrian rifting. Afterwards, the passive margin converted to an active margin most probably about Late Devonian to Late Cretaceous through the subduction of the exotic allochthons beneath the North American plate. The late Jurassic to Cretaceous subduction of (Sevier and Laramide Orogeny) representing as a period of the back thrust, intraplate thrusting, behind a magmatic arc on the upper plate

The theory of sea- floor spreading was introduced by Herny Hess in 1960s. Hess came with the idea that new oceanic floor formed at the mid oceanic ridges. Ridges is a crack in the earth’s crust through which spreads rock rises to the surface. The Melton rock spreads out and adds new material to the ocean floor. The new materials are carried away from the mid oceanic ridges. Sea floor spreading explains the existence of pillow lava near the ridges and the absence of thick layers of sediments on the

SES4U4-A 10/14/2015 Mr. Ramphal Streetsville Secondary School U3A5 - Evidence of Moving Continents The Movement of Continents Introduction How do we know that continents can move across vast distances over a long enough period of time? It is very hard to imagine what amounts to 150 million kilometers squared of land that we have on the earth moving such an incredible distance. This was the main idea opposing the Continental Shift theory: there were no known forces strong enough to move

There are many similarities and differences between continental drift, seafloor spreading and plate tectonics. All three of these theories have yet to be proved correct. But the evidence is sound so therefore it is regarded as the truth. Plate tectonics is a more recent and detailed theory than continental drift. Seafloor spreading is caused mostly because of what occurs in the other two theories. All three theories work together to help us understand the Earth. The three theories all have many