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Lab 2: Plate Tectonics & the Origin of Magma – AGI 9th ed.

Read Lab 2 p31-56. The aim of the lab is:

A. To investigate some aspects of the plate tectonic model.

B. To interpret rates and directions of plate movement

C. To analyze data and associated geological processes & features.

The theory of plate tectonics is a powerful and far-reaching theory encompassing many aspects of geology. The theory explains such diverse phenomena as mountain building on continents, the evolution of ocean basins, magma chemistry, the long-term migration of plants and animals, climatic change and the movement of continents.

Turn to Lab 2 in the lab manual and read the introduction to each Part, then answer the questions in the manual in the corresponding spaces provided below.

Introduction: Earth’s Size, Continents & Ocean Basins

1.1.a Read p 31-32. What was Alfred Wegener’s observation that led him to propose the Continental Drift Hypothesis ___________________________________. (1)

1.1.b Why was this rejected?___________________________________________. (1) Why did anti-drift scientists oppose this and what was their evidence or bias? _____________________________________________________________. (1)

1.1.c What alternative hypothesis did Bernard Lindemann (1927) and Otto Hilgenberg (1933) propose? _______________________________________________. (1)

1.1.d What evidence led them to this conclusion? _____________________________________________________________. (1)

2.1 We have now mapped the Earth in far greater detain than in the early 20th century. Keeping those old hypotheses in mind, Examine pages p33, 34, 43 then choose the dominant: faulting type and plate boundary type

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