Alfred Wegener's Hypothesis About Pangaea - …

Arcs are magmatic products of destructive plate margins (stern, 2001) which are referred to as sites where new continental crust is created and old oceanic crust is subducted back into the mantle (Hawkesworth , Hergt, McDermott, Ellam, 1991).

Oceanic crust (the thin crust under the oceans) is thinner and denser than continental crust.

These finds, plus the study of sedimentation and the fossil plant in these southern continents led Alexander duToit, a South African scientist, to bolster the idea of the past existence of a supercontinent in the southern hemisphere, 's .

Alfred Wegener's Pangaea Hypothesis

This layer includes the continents as well as the rock under the oceans.

Whilst several notable observers had previously suggested that the continents on opposite sides of the Atlantic Ocean, (most notably, Africa and South America), seemed to be capable of fitting together, the hypothesis that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations was first presented by Alfred Wegener to the German Geological Society on 6 January 1912.

Alfred Wegener: Who opposed Alfred Wegener and Why?

Ralph Waldo Emerson gave some consideration to a possibility of "Continental Shifting" in his lecture "On the Relation of Man to the Globe" delivered in 1834:-

Who opposed Alfred Wegener and Why

A German meteorologist, Alfred Wegener observed that the coastlines of the seven continents could be fitted together almost perfectly like a jigsaw puzzle.

Wegener's hypothesis fell out of ..

Then there is the curious fact noticed by Lord Bacon, and though the inference might seem too daring, it is yet repeated by modern geologists, that the shape of the corresponding coasts of Africa and America would induce us to infer that the two continents of Africa and America were once united ...