Go to the following Geotours Folder in Google Earth: 2. Exploring Geology Using

Question

Go to the following Geotours Folder in Google Earth: 2. Exploring Geology Using Google Earth ? Geotour Worksheets ? K. Earth History. Check and double-click the “Paleogeographic Model” folder in the "Global Paleogeographic Model" folder within the K. Earth History worksheet folder and make the entire folder semi-transparent. Turn on the latitude and longitude lines (View ? Grid) and Borders and Labels in the Layers panel. Now, play the time animation through several times and rotate the globe to watch the animation from different perspectives. You can manually play the animation by grabbing the right part of the time slider and moving it, or you can toggle the animation on/off automatically by clicking the right-most clock icon in the historical animation box (upper left corner of the Google Earth viewer). Leave the Paleogeographic Maps checked to answer the following questions. Check and double-click placemark Problem 1g. When did the supercontinent start rifting apart?

220-170 Ma

350-300 Ma

280-250 Ma

100-50 Ma

Explanation / Answer

1g. When did the supercontinent start rifting apart?

(a) 220-170 Ma

Pangea is the recent supercontinent started to break up about 200 million years ago due to movement of the tectonic plates and mantle convection.A rift of new material began due to a weakness started growing in the crust. In weak area, magma started pushing through and created the volcanic rift zone.Finally, the rift zone went so large and resulted in formation of a basin and Pangea started to separate.

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