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Abraham Ortelius
Abraham Ortelius Born in 1527 died in 1598 theory in 1596
Theory: suggested that North and South America, Eurasia, and Africa were once joined and have since drifted apart
Evidence:The jigsaw fit of the continents. this fit is especially close when the under water continental shelves of the continents are matched -
Nicolaus Steno's law of superpossion
theory:Law of super possision Evidence:Assuming that all rocks and minerals had once been fluid, Nicolas Steno reasoned that rock strata were formed when particles in a fluid such as water fell to the bottom. This process would leave horizontal layers. Thus Steno's principle of original horizontality states that rock layers form in the horizontal position, and any deviations from this horizontal position are due to the rocks being disturbed later. we agree because what he is saying I thought -
James Hutton
James Hutton:
Born: 1726-1797
Theory: Hutton hit on a variety of ideas to explain the rock formations he saw around him, but according to Play fair he "was in no haste to publish his theory; for he was one of those who are much more delighted with the contemplation of truth, than with the praise of having discovered it”.
Evidense: It compares rock layers to rocks above and below the rock. -
Alfred Wegener 's theroy of Pangea
Theory: Was the theory of Pangaea Evidence: claimed that the continents had formed a single land mass, which split apart. Agree because it is true and it makes sense and from what I see it really happend and because all the Continental plates fit together with other. -
Harry Hess' theroy of sea floor spreading
Theory: sea floor spreading Evidence : He was the first to draw up theories using the considerable discoveries on the nature of the ocean floor that were made in the postwar period. The whole of the ocean floor was discovered to be surprisingly young, dating only as far back as the Mesozoic, while the continental rocks were much older. I agree with his idea b/c the seafloor would be youngger than the contenints b/c they are constantly replaced by new moltn r -
Dan Mckenzie
Dan McKenzie: He wrote the first paper defining the principles of plate tectonics, and his early work on mantle convection created the modern discussion of planetary interiors Theory: Theory of Plate Tectonics and mantel convection born in 1942 and made the theory in 1968 Evidence: Dan McKenzieD published his first article on plate tectonics, earths outermost layer, lithosphere, is broken into 7 large, rigid pieces and there is several miner plates.