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Ahead of its Time.   It has been recognized for along time that coastlines of South America and Africa appear to fit together  Still it is another.

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Presentation on theme: "Ahead of its Time.   It has been recognized for along time that coastlines of South America and Africa appear to fit together  Still it is another."— Presentation transcript:

1 Ahead of its Time

2   It has been recognized for along time that coastlines of South America and Africa appear to fit together  Still it is another feature of Geology where direct information had been missing, and the thinking of individuals were much different. Background

3   In 1858, a French naturalist offered fossil evidence to support the idea that the continents were once joined, but his reasoning for the movement was Noah’s Ark and the flood associated with it.

4   In the late 19 th century, many scientist, and others thought that continents and oceans of the Earth were stable and unmoving.

5   In 1908, a geologist, F.B. Taylor noted that the distribution of some of the world’s mountain chains could be explained if the continents were once joined.

6   Mountain belts of a similar age and rock appear to begin abruptly at coastline on the other side of the ocean. When joined, the mountain chain form a continuous belt.

7   In 1915, Alfred Wegener, published his work and studies which coined the term “ Continental Drift”.  He was not the first with the idea, but he was investigated the idea extensively, with several pieces of supporting evidence that were believable. Along Came Wegener

8   That all landmasses were once joined in a supercontinent, which he termed “Pangaea”  This supercontinent separated into two landmasses, the northern landmass was termed Laurasia, and the southern landmass Gondwanaland.  The landmasses have further moved and separated to where they are today. Wegener’s Continental Drift Theory

9   Palaeontological (or fossil evidence) His Evidence

10   Glacial evidence

11   Climatological evidence

12   Lithological or rock evidence  Mountain chain evidence, already shown.

13   Wegner had valid evidence but he did not have a reason for the movement.  What was the cause for this movement of continents?  Because of the missing element he was criticised for over 15 years. And the debate continued after his death until new evidence emerged after World War II.  The new evidence lead to the new theory- “Plate Tectonics” The Trouble


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