Figure 1. Varying sea levels of the late Ordovician. http://insugeo.org.ar/libros/cg_17/077_1.jpg

Figure 2. The relation between Atmospheric CO2 and average global temperatures. http://stevengoddard.files.wordpress.com/2010/12/image002-3.gif

Figure 3. A global sea level fluctuation chart. http://www.agilegeoscience.com/storage/post-

images/Phanerozoic_Sea_Level.png?__SQUARESPACE_CACHEVERSION=1302539501583

Figure 4: A minor pyrite formation in the Gull River, indicating there were low

oxygen levels (in order for the pyrite to form there must be low amounts of

oxygen).

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