-
First Theory of Continental Drif is Proposed by Abraham Ortelius
Abraham Ortelius proposed that continents were joined together before drifting to their present position. His evidence was that the shape of the coasts of the continents were similar and when put together they would become like puzzle pieces. At his time the theory of continental drift and plate tectonics were considered fake so his theory was not approved by the scientific society. -
Alfred Wegener's book The Origins of the Continents and Oceans
In his book Alfred Wegener claimed that continents had been joined together and drifted apart over time ( continental drift). His evidence was that coast lines line up, similar plants and rocks were on the coasts, glacial deposits, and similar fossils. His hypothesis was not agreed with though because he did not have enough proof to support it. -
Arthur Holmes published Principles of Physical Geology
In his book Arthur Holmes hypothesized that continents are carried by the flow of the mantle on which they sit on, and that the mantle is flowing because it's convecting. His evidence was that Earths heat is being lost and cooling the interior therefor convecting the mantle. His theory was agreed with by the scientific community because his evidence was all true and strong. -
Harry Hess published The History of Ocean Basins
In his book Harry Hess claimed that oceans grew from their centers with molten material oozing up from the Earth's mantle along the mid ocean ridges and that created a new sea floor which spread away from the ridge in both directions. His evidence was that oceans were shallower in the middle and identified the Mid Ocean Ridges, raised above the surrounding generally . His theory was not agreed with because his evidence was unclear . -
Lawrence Morely proposed an Outlandish Theory
Lawrence Morely proposed that overtime on Earth the magnetic poles reverse, locking the new elements in the rock at the mid ocean ridge in the opposite orientation. His evidence was that rocks have symmetrical patterns of magnetic reversal and that magnetism in the crust to align with magnetic fields. The scientific community agreed with his hypothesis because it was the first on magnism and how it relates to sea floor spreading. -
Fred Vine's major contribution to the Vine-Matthews Hypothesis was published
Fred Vine's hypothesis said blocks of sea ocean crust that contain magnetized rocks, some oriented along Earth's present magnetic field, and others that are opposite showing that the magnetic field changes direction. His evidence was that basalts of the sea floor were found to be the same age at simmilar distances away from each side of the ridge. Most of the scientific community agreed with his hypothesis because he was the first to test sea floor spreading. -
Dan McKenzie published his first article on plate tectonics
Dan McKenzie hypothesized that there are two layers in the mantle each of which are in the motion controlling the movement and behavior of tectonic plates. His evidence was that he used other theories to support his and also used thermodynamics to prove it. The scientific community agreed with it because it had valid and strong evidence. -
Drummond Hoyle Matthews began to study deep crustal seismic events
Drummond Hoyle Matthews created a theory that said that earths magnetic field changed direction from current to opposite. His evidence was that basalts were found to be similar ages and distances away from the ridge. At this point in time scientists believed in plate tectonic theories so his theory was agreed with.
